CVE-2026-89091

8.8 HIGH

Published 2026-10-08 · Updated 2026-10-09

AI risk analysis

Summary: The flaw allows an attacker to overwrite arbitrary files by chaining symbolic links in a crafted collection tarball, leading to code execution.
Exploitability: Exploitation requires the attacker to get a victim to install a malicious collection, which is moderately hard to achieve.
Blast radius: If exploited, the attacker can execute code with the privileges of the user running ansible-galaxy, potentially leading to full system compromise.
Detection: No reliable host or network indicator is derivable from the published description.
Prioritized remediation: Upgrade to ansible-core 2.11.8 or later.

rcefile-overwriteansiblecollection

Analysis generated locally by qwen2.5:7b-instruct (no data left the box). AI-assisted — verify against primary sources before acting.

NVD 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.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Weaknesses

CWE-59

All references

Source data: NVD (nvd.nist.gov), public domain. Exploit-DB.ai adds local AI analysis for defensive use only.

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