CVE Watch28 oct 2026

CVE-2026-109411

An access control bypass flaw was found in Samba's vfs_ceph_rgw module in it's openat() function. An authenticated user can bypass access co

CVSS

8.1

Alto

EPSS

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KEV

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Exploit Today

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0-100

Publicado: 28 oct 2026 · Última mod.: 28 oct 2026 · CWE-178

EPSS · 30d

Sin historial EPSS suficiente todavía.

Descripción técnica

An access control bypass flaw was found in Samba's vfs_ceph_rgw module in it's openat() function. An authenticated user can bypass access controls to read or overwrite restricted files on shares configured with the experimental vfs_ceph_rgw module. When a client requests an existing file using mismatched character casing, the module fails to perform a case-insensitive lookup correctly, causing the server to treat the operation as creating a new file. As a result, the server skips standard permission checks on the existing file, allowing the attacker to access or overwrite sensitive data owned by other users.

Referencias oficiales

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