CVE-2026-79705
Full vulnerability record from the local CVENow database.
Description
A flaw was found in the buildah/copier Go package. When used outside of Buildah by a non-root caller, a crafted tar archive containing malicious symlinks can escape the target extraction directory and create files outside the intended destination. Buildah itself uses chroot hardening and is not affected.
Severity
MEDIUM
CVSS score
4.5
(v3.1)
Vulnerability status
Awaiting Analysis
Source identifier
Published
2026-09-15 17:17:27.313000
Last modified
2026-10-30 08:16:59.980000
View original CVE JSON
{
"id": "CVE-2026-79705",
"sourceIdentifier": "[email protected]",
"published": "2026-09-15T17:17:27.313",
"lastModified": "2026-10-30T08:16:59.980",
"vulnStatus": "Awaiting Analysis",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "A flaw was found in the buildah/copier Go package. When used outside of Buildah by a non-root caller, a crafted tar archive containing malicious symlinks can escape the target extraction directory and create files outside the intended destination. Buildah itself uses chroot hardening and is not affected."
}
],
"affected": [
{
"source": "[email protected]",
"affectedData": [
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"lessThan": "*",
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}
]
},
{
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"metrics": {
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{
"source": "[email protected]",
"type": "Secondary",
"cvssData": {
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"vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:H/A:N",
"baseScore": 4.5,
"baseSeverity": "MEDIUM",
"attackVector": "NETWORK",
"attackComplexity": "LOW",
"privilegesRequired": "HIGH",
"userInteraction": "REQUIRED",
"scope": "UNCHANGED",
"confidentialityImpact": "NONE",
"integrityImpact": "HIGH",
"availabilityImpact": "NONE"
},
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}
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{
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],
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}
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},
"weaknesses": [
{
"source": "[email protected]",
"type": "Secondary",
"description": [
{
"lang": "en",
"value": "CWE-22"
}
]
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],
"references": [
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"source": "[email protected]"
},
{
"url": "https://access.redhat.com/security/cve/CVE-2026-79705",
"source": "[email protected]"
},
{
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2523419",
"source": "[email protected]"
}
]
}