CVE-2026-11837
Full vulnerability record from the local CVENow database.
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
HIGH
CVSS score
7.3
(v3.1)
Vulnerability status
Awaiting Analysis
Source identifier
Published
2026-06-10 05:16:38.510000
Last modified
2026-10-29 14:17:53.743000
View original CVE JSON
{
"id": "CVE-2026-11837",
"sourceIdentifier": "[email protected]",
"published": "2026-06-10T05:16:38.510",
"lastModified": "2026-10-29T14:17:53.743",
"vulnStatus": "Awaiting Analysis",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "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."
},
{
"lang": "es",
"value": "Una vulnerabilidad de escalada de privilegios local fue encontrada en el módulo ansible.posix authorized_key. La función keyfile() del módulo utiliza os.chown() en lugar de os.lchown() y abre archivos sin O_NOFOLLOW al gestionar claves SSH autorizadas. Un usuario local sin privilegios puede preconfigurar enlaces simbólicos en su directorio ~/.ssh para redirigir los cambios de propiedad de archivos a rutas de sistema arbitrarias cuando un operador ejecuta la tarea authorized_key como root, lo que lleva a una escalada de privilegios local."
}
],
"affected": [
{
"source": "[email protected]",
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{
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"metrics": {
"cvssMetricV31": [
{
"source": "[email protected]",
"type": "Secondary",
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"attackComplexity": "LOW",
"privilegesRequired": "LOW",
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"scope": "UNCHANGED",
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"source": "[email protected]",
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"references": [
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}