cluster-backup-operator: cluster-backup-operator: Restore.spec.hooks passed verbatim to Velero Restore — arbitrary command execution in rest…
cve CVE-2026-66798 2 sources, 2 claims · Watch
Red Hat writes:
cluster-backup-operator: cluster-backup-operator: Restore.spec.hooks passed verbatim to Velero Restore — arbitrary command execution in restored pods the claim
cluster-backup-operator: cluster-backup-operator: Restore.spec.hooks passed verbatim to Velero Restore — arbitrary command execution in restored pods the claim
- Severity they disagree
- MEDIUM NVDimportant Red Hat
- CVSS they disagree
- 4.3 NVD8.8 Red Hat
- Fixed in
- 152.0.4191.52 NVD
- Vendor
- Microsoft NVD
- Product
- Microsoft Edge (Chromium-based) NVD
- CWE
- CWE-416 NVDCWE-77 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 | none N | low L |
| User interaction UI | required R | none N |
| Scope S | unchanged U | unchanged U |
| Confidentiality C | none N | high H |
| Integrity I | none N | high H |
| Availability A | low L | high H |
Each source scores the same vulnerability from what it judges the attack to need. The rows marked are where they judge it differently.
Timeline
| 2026-08-11 | first spoke of it: cluster-backup-operator: cluster-backup-operator: Restore.spec.hooks passed verbatim to Velero Restore — arbitrary command execution in restored pods | Red Hat |
| 2026-08-28 | first spoke of it: Use after free in Microsoft Edge (Chromium-based) allows an unauthorized attacker to execute code over a network. | NVD |
cluster-backup-operator: cluster-backup-operator: Restore.spec.hooks passed verbatim to Velero Restore — arbitrary command execution in restored pods
What it is to other things
| affects | microsoft/edge_chromium NVD |
| made_by | microsoft NVD |
In words only, so not counted until a person confirms one:
| affects | microsoft/microsoft_edge_chromium_basedNVD says “Microsoft · Microsoft Edge (Chromium-based)” |
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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"affected": [
{
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"vendor": "Microsoft",
"versions": [
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"version": "-"
}
]
},
{
"product": "Microsoft Edge for Android",
"vendor": "Microsoft",
"versions": [
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"status": "affected",
"version": "1.0.0.0",
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}
]
},
{
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"vendor": "Microsoft",
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"status": "affected",
"version": "1.0.0.0",
"versionType": "custom"
}
]
},
{
"product": "Microsoft Edge for Linux",
"vendor": "Microsoft",
"versions": [
{
"lessThan": "152.0.4191.52",
"status": "affected",
"version": "1.0.0",
"versionType": "custom"
}
]
},
{
"product": "Microsoft Edge for MAC",
"vendor": "Microsoft",
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"versionType": "custom"
}
]
},
{
"product": "Microsoft Edge for Windows",
"vendor": "Microsoft",
"versions": [
{
"lessThan": "152.0.4191.52",
"status": "affected",
"version": "1.0.0.0",
"versionType": "custom"
}
]
}
],
"source": "secure@microsoft.com"
}
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} | — | ||||
| CVSS cvss conflict | NVD | 4.3receipt
What the source handed over{
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{
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{
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"vendor": "Microsoft",
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}
],
"source": "secure@microsoft.com",
"type": "Secondary"
}
]
}
} | — | ||||
| CVSS cvss conflict | Red Hat | 8.8receipt
What the source handed over{
"CVE": "CVE-2026-66798",
"CWE": "CWE-77",
"advisories": [
"RHSA-2026:60391",
"RHSA-2026:60390",
"RHSA-2026:60386",
"RHSA-2026:60389",
"RHSA-2026:60388",
"RHSA-2026:60387"
],
"affected_packages": [
"rhacm2/cluster-backup-rhel9-operator:1787684668",
"rhacm2/cluster-backup-rhel9-operator:1787238500",
"rhacm2/cluster-backup-rhel9-operator:1787227576",
"rhacm2/cluster-backup-rhel9-operator:1787183178",
"rhacm2/cluster-backup-rhel9-operator:1787183176",
"rhacm2/cluster-backup-rhel9-operator:1787259060"
],
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"cvss3_score": "8.8",
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"package_state": null,
"public_date": "2026-08-11T00:00:00Z",
"resource_url": "https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-66798.json",
"severity": "important"
} | — | ||||
| CVSS vector cvss_vector not compared | NVD | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:Lreceipt
What the source handed over{
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"vendor": "Microsoft",
"versions": [
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{
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"vendor": "Microsoft",
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{
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},
{
"product": "Microsoft Edge for Linux",
"vendor": "Microsoft",
"versions": [
{
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"status": "affected",
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{
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}
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"source": "secure@microsoft.com"
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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:Hreceipt
What the source handed over{
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"resource_url": "https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-66798.json",
"severity": "important"
} | — | ||||
| CWE cwe different words | NVD | CWE-416receipt
What the source handed over{
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{
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{
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"versions": [
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{
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{
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} | — | ||||
| CWE cwe different words | Red Hat | CWE-77receipt
What the source handed over{
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"advisories": [
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"RHSA-2026:60390",
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"RHSA-2026:60388",
"RHSA-2026:60387"
],
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"rhacm2/cluster-backup-rhel9-operator:1787238500",
"rhacm2/cluster-backup-rhel9-operator:1787227576",
"rhacm2/cluster-backup-rhel9-operator:1787183178",
"rhacm2/cluster-backup-rhel9-operator:1787183176",
"rhacm2/cluster-backup-rhel9-operator:1787259060"
],
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"cvss3_score": "8.8",
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"resource_url": "https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2026-66798.json",
"severity": "important"
} | — | ||||
| Exploitation exploitation | NVD | none No evidence of exploitation, and no public proof of concept. receipt
What the source handed over{
"cve": {
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| Fixed in fixed_in | NVD | 152.0.4191.52receipt
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| Packages packages | Red Hat | rhacm2/cluster-backup-rhel9-operator:1787684668, rhacm2/cluster-backup-rhel9-operator:1787238500, rhacm2/cluster-backup-rhel9-operator:1787227576, rhacm2/cluster-backup-rhel9-operator:1787183178, rhacm2/cluster-backup-rhel9-operator:1787183176, rhacm2/cluster-backup-rhel9-operator:1787259060receipt
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} | — | ||||
| Product product | NVD | Microsoft Edge (Chromium-based)receipt
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| Severity severity conflict | NVD | MEDIUM From 4.0 to 6.9. receipt
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| Severity severity conflict | Red Hat | important A flaw that can easily compromise confidentiality, integrity or availability. receipt
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}
]
}
} | — | ||||
| Technical impact technical_impact | NVD | total The attacker gains full control of the component, or all of its information. receipt
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} | — | ||||
| Vendor vendor | NVD | Microsoftreceipt
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],
"source": "secure@microsoft.com",
"type": "Secondary"
}
]
}
} | — |
Every claim, by kind
vulnerability
| cluster-backup-operator: cluster-backup-operator: Restore.spec.hooks passed verbatim to Velero Restore — arbitrary command execution in restored pods zetlyn/cve-redhat · 2026-08-11 | cvss 8.8 cvss_vector CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H cwe CWE-77 packages rhacm2/cluster-backup-rhel9-operator:1787684668, rhacm2/cluster-backup-rhel9-operator:1787238500, rhacm2/cluster-backup-rhel9-operator:1787227576, rhacm2/cluster-backup-rhel9-operator:1787183178, rhacm2/cluster-backup-rhel9-operator:1787183176, rhacm2/cluster-backup-rhel9-operator:1787259060 severity important | source |
| Use after free in Microsoft Edge (Chromium-based) allows an unauthorized attacker to execute code over a network. zetlyn/cve-nvd · 2026-08-28 | automatable no cvss 4.3 cvss_vector CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L cwe CWE-416 exploitation none fixed_in 152.0.4191.52 product Microsoft Edge (Chromium-based) severity MEDIUM status Analyzed technical_impact total vendor Microsoft | source |