pyOpenSSL: DTLS cookie callback buffer overflow
cve CVE-2026-27459 2 sources, 2 claims · Watch
What it is to other things
| affects | pyopenssl/pyopenssl NVD |
| made_by | pyopenssl NVD |
In words only, so not counted until a person confirms one:
| affects | pyca/pyopensslNVD says “pyca · pyopenssl” |
| made_by | pycaNVD says “pyca” |
What each source says
| Property | Source | Said | Means here | ||||
|---|---|---|---|---|---|---|---|
| Cvss cvss conflict | NVD | 9.8receipt
What the source handed over{
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{
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{
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"vendor": "pyca",
"versions": [
{
"status": "affected",
"version": ">= 22.0.0, < 26.0.0"
}
]
}
],
"source": "security-advisories@github.com"
},
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"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
"url": "https://access.redhat.com/errata/RHSA-2026:7224"
},
{
"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
"url": "https://access.redhat.com/errata/RHSA-2026:8437"
},
{
"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
"url": "https://access.redhat.com/security/cve/CVE-2026-27459"
},
{
"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2448503"
},
{
"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-27459.json"
}
],
"sourceIdentifier": "security-advisories@github.com",
"vulnStatus": "Modified",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-120"
}
],
"source": "security-advisories@github.com",
"type": "Secondary"
},
{
"description": [
{
"lang": "en",
"value": "CWE-120"
}
],
"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
"type": "Secondary"
}
]
}
} | — | ||||
| Cvss cvss conflict | Red Hat | 8.1receipt
What the source handed over{
"CVE": "CVE-2026-27459",
"CWE": "CWE-120",
"advisories": [
"RHSA-2026:11916",
"RHSA-2026:48085",
"RHSA-2026:11856",
"RHSA-2026:13508",
"RHSA-2026:13512",
"RHSA-2026:14835",
"RHSA-2026:13545",
"RHSA-2026:19375",
"RHSA-2026:10754",
"RHSA-2026:11996",
"RHSA-2026:68780",
"RHSA-2026:14874",
"RHSA-2026:13553",
"RHSA-2026:14873",
"RHSA-2026:59153",
"RHSA-2026:24853",
"RHSA-2026:22465",
"RHSA-2026:8437",
"RHSA-2026:48758",
"RHSA-2026:21017",
"RHSA-2026:7224"
],
"affected_packages": [
"pyopenssl-main-26.0.0-1.1.hum1",
"ansible-automation-platform-25/ee-supported-rhel8:1777398315",
"ansible-automation-platform-26/lightspeed-rhel9:1777387242",
"python3.12-pyOpenSSL-0:26.0.0-2.el9pc",
"quay/quay-rhel8:1776752646",
"ansible-automation-platform-26/hub-rhel9:1777299023",
"automation-controller-0:4.7.11-2.el9ap",
"ansible-automation-platform-26/ansible-dev-tools-rhel9:1777390240",
"ansible-automation-platform-27/lightspeed-rhel9:1787217531",
"python-pyOpenSSL-0:24.1.0-2.el8ui",
"quay/quay-rhel8:1780891395",
"ansible-automation-platform-26/eda-controller-rhel9:1777296732",
"quay/quay-rhel9:1779922205",
"python-pyOpenSSL-0:25.1.0-0.3.el9pc",
"quay/quay-rhel9:1779204086",
"quay/quay-rhel9:1784987273",
"satellite/iop-vmaas-rhel9:1789611998",
"jaeger-main-2.20.0-0.8.hum1",
"quay/quay-rhel8:1779689392",
"ansible-automation-platform-25/lightspeed-rhel8:1777403872",
"ansible-automation-platform-27/ee-supported-rhel9:1787235693",
"ansible-automation-platform-26/platform-resource-runner-rhel9:1777390333",
"quay/quay-rhel8:1776736910",
"rhtas/model-transparency-rhel9:1775815407",
"python-pyOpenSSL-0:24.1.0-2.el8pc",
"python-pyOpenSSL-0:24.1.0-2.el9pc",
"quay/quay-rhel8:1776782369",
"ansible-automation-platform-26/ee-supported-rhel9:1777391447",
"python3.12-pyOpenSSL-0:26.0.0-1.el9ap",
"python3.12-pyOpenSSL-0:26.0.0-1.el8ap"
],
"bugzilla": "2448503",
"bugzilla_description": "pyOpenSSL: DTLS cookie callback buffer overflow",
"cvss3_score": "8.1",
"cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
"cvss_score": null,
"cvss_scoring_vector": null,
"package_state": null,
"public_date": "2026-03-17T23:34:28Z",
"resource_url": "https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-27459.json",
"severity": "important"
} | — | ||||
| Cwe cwe | Red Hat | CWE-120receipt
What the source handed over{
"CVE": "CVE-2026-27459",
"CWE": "CWE-120",
"advisories": [
"RHSA-2026:11916",
"RHSA-2026:48085",
"RHSA-2026:11856",
"RHSA-2026:13508",
"RHSA-2026:13512",
"RHSA-2026:14835",
"RHSA-2026:13545",
"RHSA-2026:19375",
"RHSA-2026:10754",
"RHSA-2026:11996",
"RHSA-2026:68780",
"RHSA-2026:14874",
"RHSA-2026:13553",
"RHSA-2026:14873",
"RHSA-2026:59153",
"RHSA-2026:24853",
"RHSA-2026:22465",
"RHSA-2026:8437",
"RHSA-2026:48758",
"RHSA-2026:21017",
"RHSA-2026:7224"
],
"affected_packages": [
"pyopenssl-main-26.0.0-1.1.hum1",
"ansible-automation-platform-25/ee-supported-rhel8:1777398315",
"ansible-automation-platform-26/lightspeed-rhel9:1777387242",
"python3.12-pyOpenSSL-0:26.0.0-2.el9pc",
"quay/quay-rhel8:1776752646",
"ansible-automation-platform-26/hub-rhel9:1777299023",
"automation-controller-0:4.7.11-2.el9ap",
"ansible-automation-platform-26/ansible-dev-tools-rhel9:1777390240",
"ansible-automation-platform-27/lightspeed-rhel9:1787217531",
"python-pyOpenSSL-0:24.1.0-2.el8ui",
"quay/quay-rhel8:1780891395",
"ansible-automation-platform-26/eda-controller-rhel9:1777296732",
"quay/quay-rhel9:1779922205",
"python-pyOpenSSL-0:25.1.0-0.3.el9pc",
"quay/quay-rhel9:1779204086",
"quay/quay-rhel9:1784987273",
"satellite/iop-vmaas-rhel9:1789611998",
"jaeger-main-2.20.0-0.8.hum1",
"quay/quay-rhel8:1779689392",
"ansible-automation-platform-25/lightspeed-rhel8:1777403872",
"ansible-automation-platform-27/ee-supported-rhel9:1787235693",
"ansible-automation-platform-26/platform-resource-runner-rhel9:1777390333",
"quay/quay-rhel8:1776736910",
"rhtas/model-transparency-rhel9:1775815407",
"python-pyOpenSSL-0:24.1.0-2.el8pc",
"python-pyOpenSSL-0:24.1.0-2.el9pc",
"quay/quay-rhel8:1776782369",
"ansible-automation-platform-26/ee-supported-rhel9:1777391447",
"python3.12-pyOpenSSL-0:26.0.0-1.el9ap",
"python3.12-pyOpenSSL-0:26.0.0-1.el8ap"
],
"bugzilla": "2448503",
"bugzilla_description": "pyOpenSSL: DTLS cookie callback buffer overflow",
"cvss3_score": "8.1",
"cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
"cvss_score": null,
"cvss_scoring_vector": null,
"package_state": null,
"public_date": "2026-03-17T23:34:28Z",
"resource_url": "https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-27459.json",
"severity": "important"
} | — | ||||
| Packages packages | Red Hat | pyopenssl-main-26.0.0-1.1.hum1, ansible-automation-platform-25/ee-supported-rhel8:1777398315, ansible-automation-platform-26/lightspeed-rhel9:1777387242, python3.12-pyOpenSSL-0:26.0.0-2.el9pc, quay/quay-rhel8:1776752646, ansible-automation-platform-26/hub-rhel9:1777299023, automation-controller-0:4.7.11-2.el9ap, ansible-automation-platform-26/ansible-dev-tools-rhel9:1777390240, ansible-automation-platform-27/lightspeed-rhel9:1787217531, python-pyOpenSSL-0:24.1.0-2.el8ui, quay/quay-rhel8:1780891395, ansible-automation-platform-26/eda-controller-rhel9:1777296732, quay/quay-rhel9:1779922205, python-pyOpenSSL-0:25.1.0-0.3.el9pc, quay/quay-rhel9:1779204086, quay/quay-rhel9:1784987273, satellite/iop-vmaas-rhel9:1789611998, jaeger-main-2.20.0-0.8.hum1, quay/quay-rhel8:1779689392, ansible-automation-platform-25/lightspeed-rhel8:1777403872, ansible-automation-platform-27/ee-supported-rhel9:1787235693, ansible-automation-platform-26/platform-resource-runner-rhel9:1777390333, quay/quay-rhel8:1776736910, rhtas/model-transparency-rhel9:1775815407, python-pyOpenSSL-0:24.1.0-2.el8pc, python-pyOpenSSL-0:24.1.0-2.el9pc, quay/quay-rhel8:1776782369, ansible-automation-platform-26/ee-supported-rhel9:1777391447, python3.12-pyOpenSSL-0:26.0.0-1.el9ap, python3.12-pyOpenSSL-0:26.0.0-1.el8apreceipt
What the source handed over{
"CVE": "CVE-2026-27459",
"CWE": "CWE-120",
"advisories": [
"RHSA-2026:11916",
"RHSA-2026:48085",
"RHSA-2026:11856",
"RHSA-2026:13508",
"RHSA-2026:13512",
"RHSA-2026:14835",
"RHSA-2026:13545",
"RHSA-2026:19375",
"RHSA-2026:10754",
"RHSA-2026:11996",
"RHSA-2026:68780",
"RHSA-2026:14874",
"RHSA-2026:13553",
"RHSA-2026:14873",
"RHSA-2026:59153",
"RHSA-2026:24853",
"RHSA-2026:22465",
"RHSA-2026:8437",
"RHSA-2026:48758",
"RHSA-2026:21017",
"RHSA-2026:7224"
],
"affected_packages": [
"pyopenssl-main-26.0.0-1.1.hum1",
"ansible-automation-platform-25/ee-supported-rhel8:1777398315",
"ansible-automation-platform-26/lightspeed-rhel9:1777387242",
"python3.12-pyOpenSSL-0:26.0.0-2.el9pc",
"quay/quay-rhel8:1776752646",
"ansible-automation-platform-26/hub-rhel9:1777299023",
"automation-controller-0:4.7.11-2.el9ap",
"ansible-automation-platform-26/ansible-dev-tools-rhel9:1777390240",
"ansible-automation-platform-27/lightspeed-rhel9:1787217531",
"python-pyOpenSSL-0:24.1.0-2.el8ui",
"quay/quay-rhel8:1780891395",
"ansible-automation-platform-26/eda-controller-rhel9:1777296732",
"quay/quay-rhel9:1779922205",
"python-pyOpenSSL-0:25.1.0-0.3.el9pc",
"quay/quay-rhel9:1779204086",
"quay/quay-rhel9:1784987273",
"satellite/iop-vmaas-rhel9:1789611998",
"jaeger-main-2.20.0-0.8.hum1",
"quay/quay-rhel8:1779689392",
"ansible-automation-platform-25/lightspeed-rhel8:1777403872",
"ansible-automation-platform-27/ee-supported-rhel9:1787235693",
"ansible-automation-platform-26/platform-resource-runner-rhel9:1777390333",
"quay/quay-rhel8:1776736910",
"rhtas/model-transparency-rhel9:1775815407",
"python-pyOpenSSL-0:24.1.0-2.el8pc",
"python-pyOpenSSL-0:24.1.0-2.el9pc",
"quay/quay-rhel8:1776782369",
"ansible-automation-platform-26/ee-supported-rhel9:1777391447",
"python3.12-pyOpenSSL-0:26.0.0-1.el9ap",
"python3.12-pyOpenSSL-0:26.0.0-1.el8ap"
],
"bugzilla": "2448503",
"bugzilla_description": "pyOpenSSL: DTLS cookie callback buffer overflow",
"cvss3_score": "8.1",
"cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
"cvss_score": null,
"cvss_scoring_vector": null,
"package_state": null,
"public_date": "2026-03-17T23:34:28Z",
"resource_url": "https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-27459.json",
"severity": "important"
} | — | ||||
| Product product | NVD | pyopensslreceipt
What the source handed over{
"cve": {
"affected": [
{
"affectedData": [
{
"product": "pyopenssl",
"vendor": "pyca",
"versions": [
{
"status": "affected",
"version": ">= 22.0.0, < 26.0.0"
}
]
}
],
"source": "security-advisories@github.com"
},
{
"affectedData": [
{
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"cpes": [
"cpe:/a:redhat:ansible_automation_platform:2.5::el8"
],
"defaultStatus": "affected",
"packageName": "python3.12-pyOpenSSL",
"product": "Red Hat Ansible Automation Platform 2.5 for RHEL 8",
"vendor": "Red Hat",
"versions": [
{
"lessThan": "*",
"status": "unaffected",
"version": "0:26.0.0-1.el8ap",
"versionType": "rpm"
}
]
},
{
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"cpes": [
"cpe:/a:redhat:ansible_automation_platform:2.5::el9"
],
"defaultStatus": "affected",
"packageName": "python3.12-pyOpenSSL",
"product": "Red Hat Ansible Automation Platform 2.5 for RHEL 9",
"vendor": "Red Hat",
"versions": [
{
"lessThan": "*",
"status": "unaffected",
"version": "0:26.0.0-1.el9ap",
"versionType": "rpm"
}
]
},
{
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"cpes": [
"cpe:/a:redhat:ansible_automation_platform:2.6::el9"
],
"defaultStatus": "affected",
"packageName": "automation-controller",
"product": "Red Hat Ansible Automation Platform 2.6 for RHEL 9",
"vendor": "Red Hat",
"versions": [
{
"lessThan": "*",
"status": "unaffected",
"version": "0:4.7.11-2.el9ap",
"versionType": "rpm"
}
]
},
{
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"cpes": [
"cpe:/a:redhat:ansible_automation_platform:2.6::el9"
],
"defaultStatus": "affected",
"packageName": "python3.12-pyOpenSSL",
"product": "Red Hat Ansible Automation Platform 2.6 for RHEL 9",
"vendor": "Red Hat",
"versions": [
{
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"status": "unaffected",
"version": "0:26.0.0-1.el9ap",
"versionType": "rpm"
}
]
},
{
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"cpes": [
"cpe:/a:redhat:satellite:6.16::el8",
"cpe:/a:redhat:satellite_capsule:6.16::el8"
],
"defaultStatus": "affected",
"packageName": "python-pyOpenSSL",
"product": "Red Hat Satellite 6.16 for RHEL 8",
"vendor": "Red Hat",
"versions": [
{
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"status": "unaffected",
"version": "0:24.1.0-2.el8pc",
"versionType": "rpm"
}
]
},
{
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"cpes": [
"cpe:/a:redhat:satellite:6.16::el9",
"cpe:/a:redhat:satellite_capsule:6.16::el9"
],
"defaultStatus": "affected",
"packageName": "python-pyOpenSSL",
"product": "Red Hat Satellite 6.16 for RHEL 9",
"vendor": "Red Hat",
"versions": [
{
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"status": "unaffected",
"version": "0:24.1.0-2.el9pc",
"versionType": "rpm"
}
]
},
{
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"cpes": [
"cpe:/a:redhat:satellite:6.17::el9",
"cpe:/a:redhat:satellite_capsule:6.17::el9"
],
"defaultStatus": "affected",
"packageName": "python-pyOpenSSL",
"product": "Red Hat Satellite 6.17 for RHEL 9",
"vendor": "Red Hat",
"versions": [
{
"lessThan": "*",
"status": "unaffected",
"version": "0:25.1.0-0.3.el9pc",
"versionType": "rpm"
}
]
},
{
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"cpes": [
"cpe:/a:redhat:satellite:6.18::el9",
"cpe:/a:redhat:satellite_capsule:6.18::el9"
],
"defaultStatus": "affected",
"packageName": "python3.12-pyOpenSSL",
"product": "Red Hat Satellite 6.18 for RHEL 9",
"vendor": "Red Hat",
"versions": [
{
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"status": "unaffected",
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}
]
},
{
"collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
"cpes": [
"cpe:/a:redhat:rhui:4::el8"
],
"defaultStatus": "affected",
"packageName": "python-pyOpenSSL",
"product": "RHUI 4 for RHEL 8",
"vendor": "Red Hat",
"versions": [
{
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"status": "unaffected",
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}
]
},
{
"collectionURL": "https://catalog.redhat.com/software/containers/",
"cpes": [
"cpe:/a:redhat:ansible_automation_platform:2.5::el8"
],
"defaultStatus": "affected",
"packageName": "ansible-automation-platform-25/ee-supported-rhel8",
"product": "Red Hat Ansible Automation Platform 2.5",
"vendor": "Red Hat",
"versions": [
{
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"status": "unaffected",
"version": "1777398315",
"versionType": "rpm"
}
]
},
{
"collectionURL": "https://catalog.redhat.com/software/containers/",
"cpes": [
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],
"defaultStatus": "affected",
"packageName": "ansible-automation-platform-25/lightspeed-rhel8",
"product": "Red Hat Ansible Automation Platform 2.5",
"vendor": "Red Hat",
"versions": [
{
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"status": "unaffected",
"version": "1777403872",
"versionType": "rpm"
}
]
},
{
"collectionURL": "https://catalog.redhat.com/software/containers/",
"cpes": [
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],
"defaultStatus": "affected",
"packageName": "ansible-automation-platform-26/ansible-dev-tools-rhel9",
"product": "Red Hat Ansible Automation Platform 2.6",
"vendor": "Red Hat",
"versions": [
{
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"status": "unaffected",
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"versionType": "rpm"
}
]
},
{
"collectionURL": "https://catalog.redhat.com/software/containers/",
"cpes": [
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],
"defaultStatus": "affected",
"packageName": "ansible-automation-platform-26/eda-controller-rhel9",
"product": "Red Hat Ansible Automation Platform 2.6",
"vendor": "Red Hat",
"versions": [
{
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"status": "unaffected",
"version": "1777296732",
"versionType": "rpm"
}
]
},
{
"collectionURL": "https://catalog.redhat.com/software/containers/",
"cpes": [
"cpe:/a:redhat:ansible_automation_platform:2.6::el9"
],
"defaultStatus": "affected",
"packageName": "ansible-automation-platform-26/ee-supported-rhel9",
"product": "Red Hat Ansible Automation Platform 2.6",
"vendor": "Red Hat",
"versions": [
{
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"status": "unaffected",
"version": "1777391447",
"versionType": "rpm"
}
]
},
{
"collectionURL": "https://catalog.redhat.com/software/containers/",
"cpes": [
"cpe:/a:redhat:ansible_automation_platform:2.6::el9"
],
"defaultStatus": "affected",
"packageName": "ansible-automation-platform-26/hub-rhel9",
"product": "Red Hat Ansible Automation Platform 2.6",
"vendor": "Red Hat",
"versions": [
{
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"status": "unaffected",
"version": "1777299023",
"versionType": "rpm"
}
]
},
{
"collectionURL": "https://catalog.redhat.com/software/containers/",
"cpes": [
"cpe:/a:redhat:ansible_automation_platform:2.6::el9"
],
"defaultStatus": "affected",
"packageName": "ansible-automation-platform-26/lightspeed-rhel9",
"product": "Red Hat Ansible Automation Platform 2.6",
"vendor": "Red Hat",
"versions": [
{
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"status": "unaffected",
"version": "1777387242",
"versionType": "rpm"
}
]
},
{
"collectionURL": "https://catalog.redhat.com/software/containers/",
"cpes": [
"cpe:/a:redhat:ansible_automation_platform:2.6::el9"
],
"defaultStatus": "affected",
"packageName": "ansible-automation-platform-26/platform-resource-runner-rhel9",
"product": "Red Hat Ansible Automation Platform 2.6",
"vendor": "Red Hat",
"versions": [
{
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"status": "unaffected",
"version": "1777390333",
"versionType": "rpm"
}
]
},
{
"collectionURL": "https://catalog.redhat.com/software/containers/",
"cpes": [
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],
"defaultStatus": "affected",
"packageName": "ansible-automation-platform-27/ee-supported-rhel9",
"product": "Red Hat Ansible Automation Platform 2.7",
"vendor": "Red Hat",
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} | — | ||||
| Severity severity | Red Hat | important A flaw that can easily compromise confidentiality, integrity or availability. receipt
What the source handed over{
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"severity": "important"
} | high | ||||
| Status status | NVD | Modifiedreceipt
What the source handed over{
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} | — | ||||
| Vendor vendor | NVD | pycareceipt
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} | — |
vulnerability
| pyOpenSSL: DTLS cookie callback buffer overflow zetlyn/cve-redhat · 2026-03-17 | cvss 8.1 cwe CWE-120 packages pyopenssl-main-26.0.0-1.1.hum1, ansible-automation-platform-25/ee-supported-rhel8:1777398315, ansible-automation-platform-26/lightspeed-rhel9:1777387242, python3.12-pyOpenSSL-0:26.0.0-2.el9pc, quay/quay-rhel8:1776752646, ansible-automation-platform-26/hub-rhel9:1777299023, automation-controller-0:4.7.11-2.el9ap, ansible-automation-platform-26/ansible-dev-tools-rhel9:1777390240, ansible-automation-platform-27/lightspeed-rhel9:1787217531, python-pyOpenSSL-0:24.1.0-2.el8ui, quay/quay-rhel8:1780891395, ansible-automation-platform-26/eda-controller-rhel9:1777296732, quay/quay-rhel9:1779922205, python-pyOpenSSL-0:25.1.0-0.3.el9pc, quay/quay-rhel9:1779204086, quay/quay-rhel9:1784987273, satellite/iop-vmaas-rhel9:1789611998, jaeger-main-2.20.0-0.8.hum1, quay/quay-rhel8:1779689392, ansible-automation-platform-25/lightspeed-rhel8:1777403872, ansible-automation-platform-27/ee-supported-rhel9:1787235693, ansible-automation-platform-26/platform-resource-runner-rhel9:1777390333, quay/quay-rhel8:1776736910, rhtas/model-transparency-rhel9:1775815407, python-pyOpenSSL-0:24.1.0-2.el8pc, python-pyOpenSSL-0:24.1.0-2.el9pc, quay/quay-rhel8:1776782369, ansible-automation-platform-26/ee-supported-rhel9:1777391447, python3.12-pyOpenSSL-0:26.0.0-1.el9ap, python3.12-pyOpenSSL-0:26.0.0-1.el8ap severity important | source |
| pyOpenSSL is a Python wrapper around the OpenSSL library. Starting in version 22.0.0 and prior to version 26.0.0, if a user provided callback to `set_cookie_generate_callback` returned a cookie value greater than 256 bytes, pyOpenSSL would overflow an OpenSSL provided buffer. Starting in version 26.0.0, cookie values that are too long are now rejected. zetlyn/cve-nvd · 2026-03-18 | cvss 9.8 product pyopenssl status Modified vendor pyca | source |