curl: libcurl: Unauthorized connection reuse due to a logical error
cve CVE-2026-8458 2 sources, 2 claims · Watch
- Severity they disagree
- MEDIUM NVDimportant Red Hat
- CVSS they disagree
- 6.5 NVD8.1 Red Hat
- Fixed in
- 8.14.2, 8.16.1, 8.20.1 NVD
- Vendor
- curl NVD
- Product
- curl NVD
- CWE
- CWE-488 NVDCWE-305 Red Hat
How far exploitation has got
- No public code known
- Proof of concept
- Proof of concept, verified
- A Metasploit module
- Exploited in the wild
- Used in ransomware campaigns
Why the CVSS differs
| Metric | NVD | Red Hat |
|---|---|---|
| Attack vector AV | network N | network N |
| Attack complexity AC | low L | low L |
| Privileges required PR | low L | low L |
| User interaction UI | none N | none N |
| Scope S | unchanged U | unchanged U |
| Confidentiality C | none N | high H |
| Integrity I | high H | high H |
| Availability A | none N | none N |
Each source scores the same vulnerability from what it judges the attack to need. The rows marked are where they judge it differently.
Timeline
| 2026-07-03 | first spoke of it: libcurl might in some circumstances reuse the wrong connection when asked to do Negotiate-authenticated ones, even when they are set to use different "services". libcurl features a pool of recent connections so that subsequent requests can reuse an existing connection to avoid overhead. When reusing a connection a range of criteria must be met. Due to a logical error in the code, a request that was issued by an application could wrongfully reuse an existing connection to the same server that was authenticated using different services. | NVD |
| 2026-07-03 | first spoke of it: curl: libcurl: Unauthorized connection reuse due to a logical error | Red Hat |
What it is to other things
| affects | haxx/curl NVD |
| made_by | haxx NVD |
In words only, so not counted until a person confirms one:
| made_by | curlNVD says “curl” |
| affects | curl/curlNVD says “curl · curl” |
Every value, with what each source said and its receipt
| Property | Source | Said | Means here | ||||
|---|---|---|---|---|---|---|---|
| Automatable automatable | NVD | no At least one of those steps needs a person. receipt
What the source handed over{
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"vendor": "curl",
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"status": "affected",
"version": "97c272e5d173ad5f706443e2477f0a84f0044edd",
"versionType": "git"
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"value": "libcurl might in some circumstances reuse the wrong connection when asked to\ndo Negotiate-authenticated ones, even when they are set to use different\n\"services\".\n\nlibcurl features a pool of recent connections so that subsequent requests can\nreuse an existing connection to avoid overhead.\n\nWhen reusing a connection a range of criteria must be met. Due to a logical\nerror in the code, a request that was issued by an application could\nwrongfully reuse an existing connection to the same server that was\nauthenticated using different services."
}
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"id": "CVE-2026-8458",
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"confidentialityImpact": "NONE",
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"scope": "UNCHANGED",
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"timestamp": "2026-07-06T17:31:14.007899Z",
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}
} | — | ||||
| CVSS cvss conflict | NVD | 6.5receipt
What the source handed over{
"cve": {
"affected": [
{
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}
],
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]
}
} | — | ||||
| CVSS cvss conflict | Red Hat | 8.1receipt
What the source handed over{
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"CWE": "CWE-305",
"advisories": [
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"RHSA-2026:73516",
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"devspaces/code-rhel9:1790619703",
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"cvss3_score": "8.1",
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"cvss_score": null,
"cvss_scoring_vector": null,
"package_state": null,
"public_date": "2026-07-03T06:14:42Z",
"resource_url": "https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-8458.json",
"severity": "important"
} | — | ||||
| CVSS vector cvss_vector not compared | NVD | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:Nreceipt
What the source handed over{
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{
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}
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]
}
} | — | ||||
| CVSS vector cvss_vector not compared | Red Hat | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Nreceipt
What the source handed over{
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"resource_url": "https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-8458.json",
"severity": "important"
} | — | ||||
| CWE cwe different words | NVD | CWE-488receipt
What the source handed over{
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{
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} | — | ||||
| CWE cwe different words | Red Hat | CWE-305receipt
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"cvss_score": null,
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"package_state": null,
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"resource_url": "https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-8458.json",
"severity": "important"
} | — | ||||
| Exploitation exploitation | NVD | poc A public proof of concept exists, or exploitation is trivial. receipt
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"automatable": "no"
},
{
"technicalImpact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-07-06T17:31:14.007899Z",
"version": "2.0.3"
}
}
]
},
"published": "2026-07-03T07:16:24.630",
"references": [
{
"source": "2499f714-1537-4658-8207-48ae4bb9eae9",
"tags": [
"Patch",
"Vendor Advisory"
],
"url": "https://curl.se/docs/CVE-2026-8458.html"
},
{
"source": "2499f714-1537-4658-8207-48ae4bb9eae9",
"tags": [
"Vendor Advisory"
],
"url": "https://curl.se/docs/CVE-2026-8458.json"
},
{
"source": "2499f714-1537-4658-8207-48ae4bb9eae9",
"tags": [
"Exploit",
"Issue Tracking",
"Third Party Advisory"
],
"url": "https://hackerone.com/reports/3721183"
},
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"tags": [
"Exploit",
"Issue Tracking",
"Third Party Advisory"
],
"url": "https://hackerone.com/reports/3721183"
}
],
"sourceIdentifier": "2499f714-1537-4658-8207-48ae4bb9eae9",
"vulnStatus": "Modified",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-488"
}
],
"source": "2499f714-1537-4658-8207-48ae4bb9eae9",
"type": "Secondary"
},
{
"description": [
{
"lang": "en",
"value": "NVD-CWE-noinfo"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
} | — | ||||
| Fixed in fixed_in | NVD | 8.14.2, 8.16.1, 8.20.1receipt
What the source handed over{
"cve": {
"affected": [
{
"affectedData": [
{
"defaultStatus": "unaffected",
"product": "curl",
"vendor": "curl",
"versions": [
{
"lessThan": "8.14.2",
"status": "affected",
"version": "7.43.0",
"versionType": "semver"
},
{
"lessThan": "8.16.1",
"status": "affected",
"version": "8.15.0",
"versionType": "semver"
},
{
"lessThan": "8.20.1",
"status": "affected",
"version": "8.17.0",
"versionType": "semver"
}
]
},
{
"defaultStatus": "unaffected",
"product": "curl",
"repo": "https://github.com/curl/curl.git",
"vendor": "curl",
"versions": [
{
"lessThan": "5e99b73cf441d9c369768b9cd48b5389b9a2503d",
"status": "affected",
"version": "97c272e5d173ad5f706443e2477f0a84f0044edd",
"versionType": "git"
}
]
},
{
"defaultStatus": "unaffected",
"product": "curl",
"vendor": "curl",
"versions": [
{
"status": "affected",
"version": "8.20.0"
},
{
"status": "affected",
"version": "8.19.0"
},
{
"status": "affected",
"version": "8.18.0"
},
{
"status": "affected",
"version": "8.17.0"
},
{
"status": "affected",
"version": "8.16.0"
},
{
"status": "affected",
"version": "8.15.0"
},
{
"status": "affected",
"version": "8.14.1"
},
{
"status": "affected",
"version": "8.14.0"
},
{
"status": "affected",
"version": "8.13.0"
},
{
"status": "affected",
"version": "8.12.1"
},
{
"status": "affected",
"version": "8.12.0"
},
{
"status": "affected",
"version": "8.11.1"
},
{
"status": "affected",
"version": "8.11.0"
},
{
"status": "affected",
"version": "8.10.1"
},
{
"status": "affected",
"version": "8.10.0"
},
{
"status": "affected",
"version": "8.9.1"
},
{
"status": "affected",
"version": "8.9.0"
},
{
"status": "affected",
"version": "8.8.0"
},
{
"status": "affected",
"version": "8.7.1"
},
{
"status": "affected",
"version": "8.7.0"
},
{
"status": "affected",
"version": "8.6.0"
},
{
"status": "affected",
"version": "8.5.0"
},
{
"status": "affected",
"version": "8.4.0"
},
{
"status": "affected",
"version": "8.3.0"
},
{
"status": "affected",
"version": "8.2.1"
},
{
"status": "affected",
"version": "8.2.0"
},
{
"status": "affected",
"version": "8.1.2"
},
{
"status": "affected",
"version": "8.1.1"
},
{
"status": "affected",
"version": "8.1.0"
},
{
"status": "affected",
"version": "8.0.1"
},
{
"status": "affected",
"version": "8.0.0"
},
{
"status": "affected",
"version": "7.88.1"
},
{
"status": "affected",
"version": "7.88.0"
},
{
"status": "affected",
"version": "7.87.0"
},
{
"status": "affected",
"version": "7.86.0"
},
{
"status": "affected",
"version": "7.85.0"
},
{
"status": "affected",
"version": "7.84.0"
},
{
"status": "affected",
"version": "7.83.1"
},
{
"status": "affected",
"version": "7.83.0"
},
{
"status": "affected",
"version": "7.82.0"
},
{
"status": "affected",
"version": "7.81.0"
},
{
"status": "affected",
"version": "7.80.0"
},
{
"status": "affected",
"version": "7.79.1"
},
{
"status": "affected",
"version": "7.79.0"
},
{
"status": "affected",
"version": "7.78.0"
},
{
"status": "affected",
"version": "7.77.0"
},
{
"status": "affected",
"version": "7.76.1"
},
{
"status": "affected",
"version": "7.76.0"
},
{
"status": "affected",
"version": "7.75.0"
},
{
"status": "affected",
"version": "7.74.0"
},
{
"status": "affected",
"version": "7.73.0"
},
{
"status": "affected",
"version": "7.72.0"
},
{
"status": "affected",
"version": "7.71.1"
},
{
"status": "affected",
"version": "7.71.0"
},
{
"status": "affected",
"version": "7.70.0"
},
{
"status": "affected",
"version": "7.69.1"
},
{
"status": "affected",
"version": "7.69.0"
},
{
"status": "affected",
"version": "7.68.0"
},
{
"status": "affected",
"version": "7.67.0"
},
{
"status": "affected",
"version": "7.66.0"
},
{
"status": "affected",
"version": "7.65.3"
},
{
"status": "affected",
"version": "7.65.2"
},
{
"status": "affected",
"version": "7.65.1"
},
{
"status": "affected",
"version": "7.65.0"
},
{
"status": "affected",
"version": "7.64.1"
},
{
"status": "affected",
"version": "7.64.0"
},
{
"status": "affected",
"version": "7.63.0"
},
{
"status": "affected",
"version": "7.62.0"
},
{
"status": "affected",
"version": "7.61.1"
},
{
"status": "affected",
"version": "7.61.0"
},
{
"status": "affected",
"version": "7.60.0"
},
{
"status": "affected",
"version": "7.59.0"
},
{
"status": "affected",
"version": "7.58.0"
},
{
"status": "affected",
"version": "7.57.0"
},
{
"status": "affected",
"version": "7.56.1"
},
{
"status": "affected",
"version": "7.56.0"
},
{
"status": "affected",
"version": "7.55.1"
},
{
"status": "affected",
"version": "7.55.0"
},
{
"status": "affected",
"version": "7.54.1"
},
{
"status": "affected",
"version": "7.54.0"
},
{
"status": "affected",
"version": "7.53.1"
},
{
"status": "affected",
"version": "7.53.0"
},
{
"status": "affected",
"version": "7.52.1"
},
{
"status": "affected",
"version": "7.52.0"
},
{
"status": "affected",
"version": "7.51.0"
},
{
"status": "affected",
"version": "7.50.3"
},
{
"status": "affected",
"version": "7.50.2"
},
{
"status": "affected",
"version": "7.50.1"
},
{
"status": "affected",
"version": "7.50.0"
},
{
"status": "affected",
"version": "7.49.1"
},
{
"status": "affected",
"version": "7.49.0"
},
{
"status": "affected",
"version": "7.48.0"
},
{
"status": "affected",
"version": "7.47.1"
},
{
"status": "affected",
"version": "7.47.0"
},
{
"status": "affected",
"version": "7.46.0"
},
{
"status": "affected",
"version": "7.45.0"
},
{
"status": "affected",
"version": "7.44.0"
},
{
"status": "affected",
"version": "7.43.0"
}
]
}
],
"source": "2499f714-1537-4658-8207-48ae4bb9eae9"
}
],
"configurations": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:haxx:curl:*:*:*:*:*:*:*:*",
"matchCriteriaId": "20E8DD93-DCA1-4855-A693-6C79DC27D359",
"versionEndExcluding": "8.20.0",
"versionStartIncluding": "7.46.0",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "libcurl might in some circumstances reuse the wrong connection when asked to\ndo Negotiate-authenticated ones, even when they are set to use different\n\"services\".\n\nlibcurl features a pool of recent connections so that subsequent requests can\nreuse an existing connection to avoid overhead.\n\nWhen reusing a connection a range of criteria must be met. Due to a logical\nerror in the code, a request that was issued by an application could\nwrongfully reuse an existing connection to the same server that was\nauthenticated using different services."
}
],
"id": "CVE-2026-8458",
"lastModified": "2026-09-15T07:16:32.327",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 6.5,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N",
"version": "3.1"
},
"exploitabilityScore": 2.8,
"impactScore": 3.6,
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"type": "Secondary"
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2026-8458",
"options": [
{
"exploitation": "poc"
},
{
"automatable": "no"
},
{
"technicalImpact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-07-06T17:31:14.007899Z",
"version": "2.0.3"
}
}
]
},
"published": "2026-07-03T07:16:24.630",
"references": [
{
"source": "2499f714-1537-4658-8207-48ae4bb9eae9",
"tags": [
"Patch",
"Vendor Advisory"
],
"url": "https://curl.se/docs/CVE-2026-8458.html"
},
{
"source": "2499f714-1537-4658-8207-48ae4bb9eae9",
"tags": [
"Vendor Advisory"
],
"url": "https://curl.se/docs/CVE-2026-8458.json"
},
{
"source": "2499f714-1537-4658-8207-48ae4bb9eae9",
"tags": [
"Exploit",
"Issue Tracking",
"Third Party Advisory"
],
"url": "https://hackerone.com/reports/3721183"
},
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"tags": [
"Exploit",
"Issue Tracking",
"Third Party Advisory"
],
"url": "https://hackerone.com/reports/3721183"
}
],
"sourceIdentifier": "2499f714-1537-4658-8207-48ae4bb9eae9",
"vulnStatus": "Modified",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-488"
}
],
"source": "2499f714-1537-4658-8207-48ae4bb9eae9",
"type": "Secondary"
},
{
"description": [
{
"lang": "en",
"value": "NVD-CWE-noinfo"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
} | — | ||||
| Packages packages | Red Hat | rhui5/installer-rhel9:1790241922, cert-manager/jetstack-cert-manager-acmesolver-rhel9:1790589998, cert-manager/jetstack-cert-manager-rhel9:1790223279, curl-0:8.12.1-1.el10_0.10, devspaces/code-rhel9:1790619703, cert-manager/cert-manager-istio-csr-rhel9:1790223719, cert-manager/cert-manager-operator-rhel9:1790272426, rust-main-1.96.1-1.hum1, cert-manager/cert-manager-istio-csr-rhel9:1790589914, curl-main-8.21.0-0.1.hum1, rhui5/cds-rhel9:1790241954, curl-0:8.12.1-4.el10_2.6, cert-manager/cert-manager-operator-rhel9:1790589855, rhui5/cds-kubernetes-rhel9:1790241897, rhui5/haproxy-rhel9:1790241900, curl-0:7.76.1-40.el9_8.7, cert-manager/jetstack-cert-manager-rhel9:1790589912, rhui5/rhua-rhel9:1790242004receipt
What the source handed over{
"CVE": "CVE-2026-8458",
"CWE": "CWE-305",
"advisories": [
"RHSA-2026:72470",
"RHSA-2026:72394",
"RHSA-2026:29017",
"RHSA-2026:72475",
"RHSA-2026:72395",
"RHSA-2026:72399",
"RHSA-2026:72476",
"RHSA-2026:34975",
"RHSA-2026:73516",
"RHSA-2026:71603",
"RHSA-2026:72506",
"RHSA-2026:69126",
"RHSA-2026:69125"
],
"affected_packages": [
"rhui5/installer-rhel9:1790241922",
"cert-manager/jetstack-cert-manager-acmesolver-rhel9:1790589998",
"cert-manager/jetstack-cert-manager-rhel9:1790223279",
"curl-0:8.12.1-1.el10_0.10",
"devspaces/code-rhel9:1790619703",
"cert-manager/cert-manager-istio-csr-rhel9:1790223719",
"cert-manager/cert-manager-operator-rhel9:1790272426",
"rust-main-1.96.1-1.hum1",
"cert-manager/cert-manager-istio-csr-rhel9:1790589914",
"curl-main-8.21.0-0.1.hum1",
"rhui5/cds-rhel9:1790241954",
"curl-0:8.12.1-4.el10_2.6",
"cert-manager/cert-manager-operator-rhel9:1790589855",
"rhui5/cds-kubernetes-rhel9:1790241897",
"rhui5/haproxy-rhel9:1790241900",
"curl-0:7.76.1-40.el9_8.7",
"cert-manager/jetstack-cert-manager-rhel9:1790589912",
"rhui5/rhua-rhel9:1790242004"
],
"bugzilla": "2496764",
"bugzilla_description": "curl: libcurl: Unauthorized connection reuse due to a logical error",
"cvss3_score": "8.1",
"cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N",
"cvss_score": null,
"cvss_scoring_vector": null,
"package_state": null,
"public_date": "2026-07-03T06:14:42Z",
"resource_url": "https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-8458.json",
"severity": "important"
} | — | ||||
| Product product | NVD | curlreceipt
What the source handed over{
"cve": {
"affected": [
{
"affectedData": [
{
"defaultStatus": "unaffected",
"product": "curl",
"vendor": "curl",
"versions": [
{
"lessThan": "8.14.2",
"status": "affected",
"version": "7.43.0",
"versionType": "semver"
},
{
"lessThan": "8.16.1",
"status": "affected",
"version": "8.15.0",
"versionType": "semver"
},
{
"lessThan": "8.20.1",
"status": "affected",
"version": "8.17.0",
"versionType": "semver"
}
]
},
{
"defaultStatus": "unaffected",
"product": "curl",
"repo": "https://github.com/curl/curl.git",
"vendor": "curl",
"versions": [
{
"lessThan": "5e99b73cf441d9c369768b9cd48b5389b9a2503d",
"status": "affected",
"version": "97c272e5d173ad5f706443e2477f0a84f0044edd",
"versionType": "git"
}
]
},
{
"defaultStatus": "unaffected",
"product": "curl",
"vendor": "curl",
"versions": [
{
"status": "affected",
"version": "8.20.0"
},
{
"status": "affected",
"version": "8.19.0"
},
{
"status": "affected",
"version": "8.18.0"
},
{
"status": "affected",
"version": "8.17.0"
},
{
"status": "affected",
"version": "8.16.0"
},
{
"status": "affected",
"version": "8.15.0"
},
{
"status": "affected",
"version": "8.14.1"
},
{
"status": "affected",
"version": "8.14.0"
},
{
"status": "affected",
"version": "8.13.0"
},
{
"status": "affected",
"version": "8.12.1"
},
{
"status": "affected",
"version": "8.12.0"
},
{
"status": "affected",
"version": "8.11.1"
},
{
"status": "affected",
"version": "8.11.0"
},
{
"status": "affected",
"version": "8.10.1"
},
{
"status": "affected",
"version": "8.10.0"
},
{
"status": "affected",
"version": "8.9.1"
},
{
"status": "affected",
"version": "8.9.0"
},
{
"status": "affected",
"version": "8.8.0"
},
{
"status": "affected",
"version": "8.7.1"
},
{
"status": "affected",
"version": "8.7.0"
},
{
"status": "affected",
"version": "8.6.0"
},
{
"status": "affected",
"version": "8.5.0"
},
{
"status": "affected",
"version": "8.4.0"
},
{
"status": "affected",
"version": "8.3.0"
},
{
"status": "affected",
"version": "8.2.1"
},
{
"status": "affected",
"version": "8.2.0"
},
{
"status": "affected",
"version": "8.1.2"
},
{
"status": "affected",
"version": "8.1.1"
},
{
"status": "affected",
"version": "8.1.0"
},
{
"status": "affected",
"version": "8.0.1"
},
{
"status": "affected",
"version": "8.0.0"
},
{
"status": "affected",
"version": "7.88.1"
},
{
"status": "affected",
"version": "7.88.0"
},
{
"status": "affected",
"version": "7.87.0"
},
{
"status": "affected",
"version": "7.86.0"
},
{
"status": "affected",
"version": "7.85.0"
},
{
"status": "affected",
"version": "7.84.0"
},
{
"status": "affected",
"version": "7.83.1"
},
{
"status": "affected",
"version": "7.83.0"
},
{
"status": "affected",
"version": "7.82.0"
},
{
"status": "affected",
"version": "7.81.0"
},
{
"status": "affected",
"version": "7.80.0"
},
{
"status": "affected",
"version": "7.79.1"
},
{
"status": "affected",
"version": "7.79.0"
},
{
"status": "affected",
"version": "7.78.0"
},
{
"status": "affected",
"version": "7.77.0"
},
{
"status": "affected",
"version": "7.76.1"
},
{
"status": "affected",
"version": "7.76.0"
},
{
"status": "affected",
"version": "7.75.0"
},
{
"status": "affected",
"version": "7.74.0"
},
{
"status": "affected",
"version": "7.73.0"
},
{
"status": "affected",
"version": "7.72.0"
},
{
"status": "affected",
"version": "7.71.1"
},
{
"status": "affected",
"version": "7.71.0"
},
{
"status": "affected",
"version": "7.70.0"
},
{
"status": "affected",
"version": "7.69.1"
},
{
"status": "affected",
"version": "7.69.0"
},
{
"status": "affected",
"version": "7.68.0"
},
{
"status": "affected",
"version": "7.67.0"
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{
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} | — | ||||
| Severity severity conflict | NVD | MEDIUM From 4.0 to 6.9. receipt
What the source handed over{
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} | medium | ||||
| Severity severity conflict | Red Hat | important A flaw that can easily compromise confidentiality, integrity or availability. receipt
What the source handed over{
"CVE": "CVE-2026-8458",
"CWE": "CWE-305",
"advisories": [
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"RHSA-2026:72394",
"RHSA-2026:29017",
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"bugzilla": "2496764",
"bugzilla_description": "curl: libcurl: Unauthorized connection reuse due to a logical error",
"cvss3_score": "8.1",
"cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N",
"cvss_score": null,
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"package_state": null,
"public_date": "2026-07-03T06:14:42Z",
"resource_url": "https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-8458.json",
"severity": "important"
} | high | ||||
| Status status | NVD | Modifiedreceipt
What the source handed over{
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| Technical impact technical_impact | NVD | partial The attacker gains limited control, or limited information. receipt
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"source": "2499f714-1537-4658-8207-48ae4bb9eae9",
"type": "Secondary"
},
{
"description": [
{
"lang": "en",
"value": "NVD-CWE-noinfo"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
} | — | ||||
| Vendor vendor | NVD | curlreceipt
What the source handed over{
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"value": "libcurl might in some circumstances reuse the wrong connection when asked to\ndo Negotiate-authenticated ones, even when they are set to use different\n\"services\".\n\nlibcurl features a pool of recent connections so that subsequent requests can\nreuse an existing connection to avoid overhead.\n\nWhen reusing a connection a range of criteria must be met. Due to a logical\nerror in the code, a request that was issued by an application could\nwrongfully reuse an existing connection to the same server that was\nauthenticated using different services."
}
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}
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},
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"value": "CWE-488"
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"type": "Secondary"
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{
"description": [
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"value": "NVD-CWE-noinfo"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
} | — |
Every claim, by kind
vulnerability
| curl: libcurl: Unauthorized connection reuse due to a logical error zetlyn/cve-redhat · 2026-07-03 | cvss 8.1 cvss_vector CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N cwe CWE-305 packages rhui5/installer-rhel9:1790241922, cert-manager/jetstack-cert-manager-acmesolver-rhel9:1790589998, cert-manager/jetstack-cert-manager-rhel9:1790223279, curl-0:8.12.1-1.el10_0.10, devspaces/code-rhel9:1790619703, cert-manager/cert-manager-istio-csr-rhel9:1790223719, cert-manager/cert-manager-operator-rhel9:1790272426, rust-main-1.96.1-1.hum1, cert-manager/cert-manager-istio-csr-rhel9:1790589914, curl-main-8.21.0-0.1.hum1, rhui5/cds-rhel9:1790241954, curl-0:8.12.1-4.el10_2.6, cert-manager/cert-manager-operator-rhel9:1790589855, rhui5/cds-kubernetes-rhel9:1790241897, rhui5/haproxy-rhel9:1790241900, curl-0:7.76.1-40.el9_8.7, cert-manager/jetstack-cert-manager-rhel9:1790589912, rhui5/rhua-rhel9:1790242004 severity important | source |
| libcurl might in some circumstances reuse the wrong connection when asked to
do Negotiate-authenticated ones, even when they are set to use different
"services".
libcurl features a pool of recent connections so that subsequent requests can
reuse an existing connection to avoid overhead.
When reusing a connection a range of criteria must be met. Due to a logical
error in the code, a request that was issued by an application could
wrongfully reuse an existing connection to the same server that was
authenticated using different services. zetlyn/cve-nvd · 2026-07-03 | automatable no cvss 6.5 cvss_vector CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N cwe CWE-488 exploitation poc fixed_in 8.14.2, 8.16.1, 8.20.1 product curl severity MEDIUM status Modified technical_impact partial vendor curl | source |