Incorrect authorization in Samba - CVE-2026-109411
Published: October 23, 2026
Vulnerability identifier: #VU157554
CSH Severity: Low
CVSS v4: 5.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-109411
CWE-ID: CWE-863
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to bypass access controls and potentially gain unauthorized access to files.
The vulnerability exists due to improper access control in Samba's vfs_ceph_rgw module when handling case-insensitive file-open requests. A remote user can use case-insensitive file-open operations to bypass access restrictions and potentially access otherwise restricted files.
Affected software
Samba
How to mitigate CVE-2026-109411
Install security update from vendor's website.
Samba - update to 4.25.1