CVE-2026-11837
HighCVSS 7.3Exploitation Probability (EPSS)
Low risk5th percentile - higher than 5% of all known CVEs
Summary
Local privilege escalation vulnerability in the ansible.posix authorized_key module. The keyfile() function uses os.chown() instead of os.lchown() and opens files without O_NOFOLLOW, allowing an unprivileged user to replace symbolic links and take over system files.
Risk Assessment
An attacker can gain root privileges by replacing symbolic links in their ~/.ssh directory, leading to full system compromise.
Recommendation
Update the ansible.posix authorized_key module to a version containing the fix. Avoid running authorized_key tasks as root on untrusted systems.
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Original NVD description (English source)
A local privilege escalation vulnerability was found in the ansible.posix authorized_key module. The module's keyfile() function uses os.chown() instead of os.lchown() and opens files without O_NOFOLLOW when managing SSH authorized keys. An unprivileged local user can pre-stage symbolic links in their ~/.ssh directory to redirect file ownership changes to arbitrary system paths when an operator runs the authorized_key task as root, leading to local privilege escalation.