CVE-2026-89091
Alto¿Qué es CVE-2026-89091?
A flaw was found in ansible-core. When installing a collection with `ansible-galaxy collection install`, the archive extractor validates member paths using lexical path normalisation (os.path.abspath) instead of resolving symbolic links (os.path.realpath), and it performs no containment check on symlink-typed directory members before creating them. A crafted collection tarball can chain symlink directory entries so that a subsequent file member is written outside the intended destination directory. This allows an attacker who can get a victim to install a malicious collection to overwrite arbitrary files with the privileges of the user running ansible-galaxy, leading to code execution on the control node. This is a bypass of the fix for CVE-2020-10691.
CVSS Vector Breakdown
CVSS 3.1Exploitable remotely over the network without requiring access to the local system.
No special conditions required. Exploit can be performed reliably and repeatedly.
No authentication required. Any anonymous user can exploit this vulnerability.
Victim must take an action (e.g. click a link, open a file) for the exploit to succeed.
Exploiting the vulnerability only affects the vulnerable component itself.
Complete loss of confidentiality. All data on the component may be exposed.
Complete loss of integrity. Attacker can modify any file or data on the component.
Complete denial of service. The component becomes fully unavailable.
Preguntas frecuentes
CVE-2026-89091 tiene una puntuación CVSS de 8.8/10, clasificada como High. Esta es una vulnerabilidad de alta gravedad y debe parchearse lo antes posible.
El CVSS (Common Vulnerability Scoring System) califica la gravedad de las vulnerabilidades de 0,0 a 10,0. CVE-2026-89091 obtiene 8.8/10 (High). Las puntuaciones de 9,0–10,0 son Críticas, 7,0–8,9 Altas, 4,0–6,9 Medias y por debajo de 4,0 Bajas.
La lista de dispositivos confirmados como afectados por CVE-2026-89091 se muestra en la sección "Dispositivos afectados" arriba. Compare su versión de firmware con el aviso de seguridad del proveedor y aplique el último parche.
Aplique la última actualización de firmware o software del proveedor. Consulte la sección de Referencias arriba para ver avisos oficiales y notas de parches. Si no hay parche disponible, considere deshabilitar la función afectada o aislar el dispositivo de redes no confiables.