{"id":"CVE-2026-11837","title":"A local privilege escalation vulnerability was found in the ansible.posix authorized_key module","summary":"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.…","severity":"high","cvss":7.3,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H","cwe":["CWE-59"],"vendor":"Red Hat","product":"rhc-worker-playbook","affected":["rhc-worker-playbook (all versions)","rhel-system-roles","rhc-worker-playbook (all versions)","rhel-system-roles","rhc-worker-playbook (all versions)","rhel-system-roles","ansible-collection-ansible-posix (all versions)","ansible-collection-ansible-posix"],"published":"2026-06-10","updated":"2026-09-09","sourceUpdated":"2026-09-09T13:18:32.693","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-11837","references":[{"url":"https://access.redhat.com/security/cve/CVE-2026-11837","label":"secalert@redhat.com"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2487424","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/security/cve/CVE-2026-11837","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2487424","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-11837.json","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"}],"tags":["nvd","cve.org","exploit-available"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-06-10T13:57:35.655997Z"},"epss":0.00161,"epssPercentile":0.0453,"exploits":{"github":1,"githubRepos":["https://github.com/M8seven/cve-2026-11837-ansible-posix-authorized-key"],"checkedAt":"2026-09-26T09:05:37.344Z"},"exploitAvailable":true,"ingestedAt":"2026-09-08T18:07:34.884Z","slug":"CVE-2026-11837","body":"## Overview\n\nA 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"midnight","depthScore":52,"depthScoreParts":{"impact":40.2,"likelihood":0,"exploitation":12,"ransomware":0},"changes":[]}