{"id":"CVE-2026-11837","aliases":["DEBIAN-CVE-2026-11837","EUVD-2026-35982","GHSA-49qh-h4vj-mrgf","RHSA-2026:79112","RHSA-2026:80508","RHSA-2026:82339","UBUNTU-CVE-2026-11837"],"status":"published","title":"Ansible-collection-ansible-posix: ansible.posix authorized_key: local privilege escalation via symlink-following chown","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.","severity":{"version":"3.1","score":7.3,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00163,"percentile":0.05581,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":true},"cwes":["CWE-59"],"published":"2026-06-10T05:03:05Z","modified":"2026-11-04T21:51:16Z","exploits":[{"source":"pocgithub","id":"M8seven/cve-2026-11837-ansible-posix-authorized-key","title":"M8seven/cve-2026-11837-ansible-posix-authorized-key","date":"2026-06-23","url":"https://github.com/M8seven/cve-2026-11837-ansible-posix-authorized-key"}],"fixes":[{"ecosystem":"Red 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18.0"}],"references":[{"url":"https://access.redhat.com/errata/RHSA-2026:42946","tags":["vendor-advisory","x_refsource_REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2026:79112","tags":["vendor-advisory","x_refsource_REDHAT","advisory"]},{"url":"https://access.redhat.com/errata/RHSA-2026:80508","tags":["vendor-advisory","x_refsource_REDHAT","advisory"]},{"url":"https://access.redhat.com/errata/RHSA-2026:82339","tags":["vendor-advisory","x_refsource_REDHAT","advisory"]},{"url":"https://access.redhat.com/security/cve/CVE-2026-11837","tags":["vdb-entry","x_refsource_REDHAT","report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2487424","tags":["issue-tracking","x_refsource_REDHAT","report"]},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-11837.json","tags":["x_sadp-csaf-vex"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-11837","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-49qh-h4vj-mrgf"},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-11837","tags":["advisory"]},{"url":"https://access.redhat.com/security/updates/classification/#important","tags":["article"]},{"url":"https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_79112.json","tags":["advisory"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-11837","tags":["advisory","report"]},{"url":"https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_80508.json","tags":["advisory"]},{"url":"https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_82339.json","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-11837","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2026-11837","title":"Ansible-collection-ansible-posix: ansible.posix authorized_key: local privilege escalation via symlink-following chown","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.","status":"published","published":"2026-06-10T05:03:05.734Z","modified":"2026-11-04T21:51:16.244Z","cvss":[{"version":"3.1","score":7.3,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"cna"},{"version":"3.1","score":7.3,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"adp"}],"cwes":["CWE-59","CWE-59"],"updated_at":"2026-11-04T22:39:15.65538Z"}],"euvd":[{"id":"EUVD-2026-35982","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.","status":"published","published":"2026-06-10T05:03:05Z","modified":"2026-11-04T21:51:16Z","cvss":[{"version":"3.1","score":7.3,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-04T23:47:19.24864Z"}],"ghsa":[{"id":"GHSA-49qh-h4vj-mrgf","title":"A local privilege escalation vulnerability was found in the ansible.posix authorized_key module....","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.","status":"published","published":"2026-06-10T06:30:27Z","modified":"2026-10-29T15:30:28Z","cvss":[{"version":"3.1","score":7.3,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-59"],"updated_at":"2026-11-02T15:14:38.164928Z"}],"nvd":[{"id":"CVE-2026-11837","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.","status":"published","published":"2026-06-10T05:16:38.51Z","modified":"2026-11-04T22:17:53.257Z","cvss":[{"version":"3.1","score":7.3,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"},{"version":"3.1","score":7.3,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-59"],"updated_at":"2026-11-04T23:43:39.147797Z"}],"osv":[{"id":"DEBIAN-CVE-2026-11837","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.","status":"published","published":"2026-06-10T05:16:38.51Z","modified":"2026-11-05T09:47:36.840044447Z","cvss":[{"version":"3.1","score":7.3,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-05T13:31:24.64316Z"},{"id":"RHSA-2026:79112","title":"Red Hat Security Advisory: rhc-worker-playbook security update","status":"published","published":"2026-10-10T10:22:40Z","modified":"2026-10-14T10:31:25Z","cvss":[{"version":"3.1","score":7.3,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:23.547034Z"},{"id":"RHSA-2026:80508","title":"Red Hat Security Advisory: rhc-worker-playbook security update","status":"published","published":"2026-10-14T10:31:46Z","modified":"2026-10-14T10:48:08.76218473Z","cvss":[{"version":"3.1","score":7.3,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:23.547034Z"},{"id":"RHSA-2026:82339","title":"Red Hat Security Advisory: rhc-worker-playbook security update","status":"published","published":"2026-10-14T10:32:45Z","modified":"2026-10-14T10:48:13.473499274Z","cvss":[{"version":"3.1","score":7.3,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:23.547034Z"},{"id":"UBUNTU-CVE-2026-11837","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.","status":"published","published":"2026-06-10T05:16:00Z","modified":"2026-10-17T12:59:52.615564531Z","cvss":[{"version":"3.1","score":7.3,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T16:56:00.081948Z"}]}}