PT-2026-30234 · Openprinting · Cups

Published 2026-04-03 · Updated 2026-04-03 · CVE-2026-27447

NVD

CVSS v3.1

4.8

Medium

AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:L/A:N

OpenPrinting CUPS is an open source printing system for Linux and other Unix-like operating systems. In versions 2.4.16 and prior, CUPS daemon (cupsd) contains an authorization bypass vulnerability due to case-insensitive username comparison during authorization checks. The vulnerability allows an unprivileged user to gain unauthorized access to restricted operations by using a user with a username that differs only in case from an authorized user. At time of publication, there are no publicly available patches.

Fix

Incorrect Authorization

Weakness Enumeration

CWE-863

Related Identifiers

CVE-2026-27447

Affected Products

Cups

References · 3

• https://nvd.nist.gov/vuln/detail/CVE-2026-27447 · Security Note
• https://github.com/OpenPrinting/cups/commit/88516bf6d9e34cef7a64a704b856b837f70cd220 · Note
• https://github.com/OpenPrinting/cups/security/advisories/GHSA-v987-m8hp-phj9 · Note