CVE-2026-55453lowCWE-74CWE-77CWE-78

CVE-2026-55453: low-severity vulnerability in OpenPrinting cups

CUPS ipp backend status-line injection can update queue PPD and lead to conditional RCE as lp via foomatic-rip

Published · Updated

Follow this CVE+ Monitor cups+ Monitor cups

E-mail alert when it lands in KEV, gets a public PoC or its score goes up.

8Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 3.3epss 0.2%
OpenPrinting CUPS is an open source printing system for Linux and other Unix-like operating systems. Prior to 2.4.20, the backend/ipp.c quote_string() function preserves carriage-return and line-feed characters in a remote printer-controlled marker-message before report_attr() writes the value to the scheduler status stream. The scheduler can parse an injected newline as a separate PPD: control line and persist an attacker-selected PPD keyword. The reporter demonstrated that a later print job on a Foomatic-backed queue could consume an injected FoomaticRIPCommandLine value and execute in the filter context as lp. This issue is fixed in version 2.4.20.
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
Affected products
OpenPrinting · cups
Related CVEs — OpenPrinting cups

In the same product, most dangerous first.

CVE-2024-35235MEDIUMCupsd Listen arbitrary chmod 0140777EPSS 2.4%CVE-2026-34980MEDIUMOpenPrinting CUPS: Shared PostScript queue lets anonymous Print-Job requests reach `lp` code execution over the networkEPSS 1.7%CVE-2023-32324HIGHOpenPrinting CUPS vulnerable to heap buffer overflowEPSS 1.5%CVE-2023-34241MEDIUMCUPS vulnerable to use-after-free in cupsdAcceptClient()EPSS 1.4%CVE-2025-58364MEDIUMcups: Remote DoS via null dereferenceEPSS 1.2%CVE-2025-58060HIGHcups has Authentication bypass with AuthType NegotiateEPSS 1.0%