Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

CVE-2026-35345

Gravedad CVSS v3.1:
MEDIA
Tipo:
CWE-59 Incorrecta resolución de una ruta antes de aceder a un fichero (Seguimiento de enlaces)
Fecha de publicación:
22/04/2026
Última modificación:
22/04/2026

Descripción

*** Pendiente de traducción *** A vulnerability in the tail utility of uutils coreutils allows for the exfiltration of sensitive file contents when using the --follow=name option. Unlike GNU tail, the uutils implementation continues to monitor a path after it has been replaced by a symbolic link, subsequently outputting the contents of the link's target. In environments where a privileged user (e.g., root) monitors a log directory, a local attacker with write access to that directory can replace a log file with a symlink to a sensitive system file (such as /etc/shadow), causing tail to disclose the contents of the sensitive file.