CVE-2026-89091
Full vulnerability record from the local CVENow database.
Description
A flaw was found in ansible-core. When installing a collection with `ansible-galaxy collection install`, the archive extractor validates member paths using lexical path normalisation (os.path.abspath) instead of resolving symbolic links (os.path.realpath), and it performs no containment check on symlink-typed directory members before creating them. A crafted collection tarball can chain symlink directory entries so that a subsequent file member is written outside the intended destination directory. This allows an attacker who can get a victim to install a malicious collection to overwrite arbitrary files with the privileges of the user running ansible-galaxy, leading to code execution on the control node. This is a bypass of the fix for CVE-2020-10691.
Severity
HIGH
CVSS score
8.8
(v3.1)
Vulnerability status
Awaiting Analysis
Source identifier
Published
2026-10-08 22:17:35.777000
Last modified
2026-11-02 23:17:21.370000
View original CVE JSON
{
"id": "CVE-2026-89091",
"sourceIdentifier": "[email protected]",
"published": "2026-10-08T22:17:35.777",
"lastModified": "2026-11-02T23:17:21.370",
"vulnStatus": "Awaiting Analysis",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "A flaw was found in ansible-core. When installing a collection with\n`ansible-galaxy collection install`, the archive extractor validates member\npaths using lexical path normalisation (os.path.abspath) instead of resolving\nsymbolic links (os.path.realpath), and it performs no containment check on\nsymlink-typed directory members before creating them. A crafted collection\ntarball can chain symlink directory entries so that a subsequent file member is\nwritten outside the intended destination directory. This allows an attacker who\ncan get a victim to install a malicious collection to overwrite arbitrary files\nwith the privileges of the user running ansible-galaxy, leading to code\nexecution on the control node. This is a bypass of the fix for CVE-2020-10691."
}
],
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{
"source": "[email protected]",
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