CVE-2026-89091 (GCVE-0-2026-89091)
Vulnerability from cvelistv5
Published
2026-10-08 21:49
Modified
2026-10-09 15:13
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-59 - Improper Link Resolution Before File Access ('Link Following')
Summary
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.
References
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Impacted products
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\"https://bugzilla.redhat.com/show_bug.cgi?id=2531646\", \"name\": \"RHBZ#2531646\", \"tags\": [\"issue-tracking\", \"x_refsource_REDHAT\"]}], \"x_generator\": {\"engine\": \"cvelib 1.8.0\"}, \"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.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-59\", \"description\": \"Improper Link Resolution Before File Access (\u0027Link Following\u0027)\"}]}], \"providerMetadata\": {\"orgId\": \"53f830b8-0a3f-465b-8143-3b8a9948e749\", \"shortName\": \"redhat\", \"dateUpdated\": \"2026-10-08T21:49:30.953Z\"}, \"x_redhatCweChain\": \"CWE-59: Improper Link Resolution Before File Access (\u0027Link Following\u0027)\"}}",
"cveMetadata": "{\"cveId\": \"CVE-2026-89091\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-10-09T15:13:02.773Z\", \"dateReserved\": \"2026-09-10T20:17:42.169Z\", \"assignerOrgId\": \"53f830b8-0a3f-465b-8143-3b8a9948e749\", \"datePublished\": \"2026-10-08T21:49:30.953Z\", \"assignerShortName\": \"redhat\"}",
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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