CVE-2026-11837CWE-59

CVE-2026-11837

High · published June 10, 2026

CVSS v3.1

7.3

EPSS

Percentile

5.2

In the wild

Unconfirmed

What it is

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.

The record

Technical detail

CVSS v3.1: 7.3 · HIGH
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
CVSS v4.0: Not supplied
EPSS: 0.00163 · 5.2th percentile
Weakness: CWE-59 · Improper Link Resolution Before File Access ('Link Following')
Published: 2026-06-10T09:16Z

References (8)

https://access.redhat.com/errata/RHSA-2026:79112 · [email protected]https://access.redhat.com/errata/RHSA-2026:80508 · [email protected]https://access.redhat.com/errata/RHSA-2026:82339 · [email protected]https://access.redhat.com/security/cve/CVE-2026-11837 · [email protected]https://bugzilla.redhat.com/show_bug.cgi?id=2487424 · [email protected]https://access.redhat.com/security/cve/CVE-2026-11837 · 0b0ca135-0b70-47e7-9f44-1890c2a1c46c https://bugzilla.redhat.com/show_bug.cgi?id=2487424 · 0b0ca135-0b70-47e7-9f44-1890c2a1c46c https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-11837.json · 0b0ca135-0b70-47e7-9f44-1890c2a1c46c

EPSS history

Timeline

10 JUN 05:03Z
Ansible-collection-ansible-posix: ansible.posix authorized_key: local privilege escalation via symlink-following chown
cvelistv5