Incorrect authorization in cups - CVE-2026-27447
Published: April 2, 2026
Vulnerability identifier: #VU124814
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:A/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-27447
CWE-ID: CWE-863
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: OpenPrinting
Affected software:
cups
cups
Detailed vulnerability description
The vulnerability allows a remote user to gain unauthorized access to restricted operations.
The vulnerability exists due to improper access control in the CUPS daemon (cupsd) when performing authorization checks. A remote privileged user can exploit case-insensitive username comparison during group-member lookup to gain unauthorized access to restricted operations.
User interaction is required to exploit this vulnerability.
How to mitigate CVE-2026-27447
Install security update from vendor's website.