CVE-2026-34980
Severity CVSS v4.0:
MEDIUM
Type:
CWE-20
Input Validation
Publication date:
03/04/2026
Last modified:
03/04/2026
Description
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.
Impact
Base Score 4.0
6.10
Severity 4.0
MEDIUM