#VU124813 Improper input validation in cups - CVE-2026-34980
Published: April 2, 2026
Vulnerability identifier: #VU124813
Vulnerability risk: High
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2026-34980
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
cups
cups
Software vendor:
OpenPrinting
OpenPrinting
Description
The vulnerability allows a remote attacker to execute arbitrary code.
The vulnerability exists due to improper input validation in CUPS PostScript queue processing when handling Print-Job requests with crafted page-border attributes. A remote attacker can send a specially crafted Print-Job request containing a newline-injected page-border value to cause a PPD configuration injection, leading to arbitrary filter execution as the lp user.
The affected system must have a shared PostScript queue enabled and be exposed to the network. The attacker does not require authentication or prior privileges.
Remediation
Install security update from vendor's website.