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Vulnerabilities CVE-2026-11837

CVE-2026-11837

High
Open
TLP:CLEAR

Ansible-collection-ansible-posix: ansible.posix authorized_key: local privilege escalation via symlink-following chown

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Description

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.

Details

CVSS Score
7.3
EPSS Score
0.16%

5.8th percentile

CVSS Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
Confidence
90%
Published
Jun 10, 2026
Last Modified
Jul 15, 2026
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