CVE-2026-11837Ansible-collection-ansible-posix: ansible.posix authorized_key: local privilege escalation via symlink-following chown
Updated under an hour ago ()
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It affects Red Hat Enterprise Linux 10.0 Extended Update Support and 6 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 7.3 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-59
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- redhat
- NVD analysis
- Awaiting Analysis
- Record last updated
- Oct 13, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support redhat:enterprise_linux_eus | from 0:0.2.3-6.el10_0.2 not affected | CNA record |
from 0:0.1.8-2.el8_6.1 not affected | CNA record | |
Red Hat Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support redhat:rhel_eus_long_life | from 0:0.1.8-2.el8_6.1 not affected | CNA record |
from 0:0.1.8-5.el8_8.1 not affected | CNA record | |
from 0:0.1.8-5.el8_8.1 not affected | CNA record | |
Red Hat Red Hat Enterprise Linux 10 redhat:enterprise_linux | 10 | CNA record |
Red Hat Red Hat OpenStack Platform 17.1 redhat:openstack | 17.1 | CNA record |
Red Hat Red Hat Enterprise Linux 10 redhat:enterprise_linux | 10 | CISA ADP |
Red Hat Red Hat OpenStack Platform 17.1 redhat:openstack | 17.1 | CISA ADP |
References
- https://access.redhat.com/errata/RHSA-2026:79112vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:80508vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:82339vendor-advisory, x-refsource-redhat
- https://access.redhat.com/security/cve/CVE-2026-11837vdb-entry, x-refsource-redhat
- https://bugzilla.redhat.com/show_bug.cgi?id=2487424issue-tracking, x-refsource-redhat
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-11837.json
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.