CVE-2026-34980: Openprinting Cups

High severity, CVSS 7.5. EPSS: 0.3% 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, in a network-exposed cupsd with a shared target queue, an unauthorized client can send a Print-Job to that shared PostScript queue without authentication. The server accepts a page-border value supplied as textWithoutLanguage, preserves an embedded newline through option escaping and reparse, and then reparses the resulting second-line PPD: text as a trusted scheduler control record. A follow-up raw print job can therefore make the server execute an attacker-chosen existing binary such as /usr/bin/vim as lp. 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.