CVE-2026-34979: Openprinting Cups

Medium severity, CVSS 5.3. EPSS: 0.4% chance of exploitation in the next 30 days.

OpenPrinting CUPS is an open source printing system for Linux and other Unix-like operating systems. In versions 2.4.16 and prior, there is a heap-based buffer overflow in the CUPS scheduler when building filter option strings from job attribute. At time of publication, there are no publicly available patches.

Affected products

• Openprinting Cups: up to and including 2.4.16

Published 2026-04-03. Last modified 2026-07-24.