{"id":"CVE-2026-55453","title":"OpenPrinting CUPS is an open source printing system for Linux and other Unix-like operating systems","summary":"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-contro…","severity":"low","cvss":3.3,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L","cwe":["CWE-74","CWE-77","CWE-78"],"vendor":"OpenPrinting","product":"cups","affected":["cups < 2.4.20"],"published":"2026-10-15","updated":"2026-10-15","sourceUpdated":"2026-10-15T18:17:27.677","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-55453","references":[{"url":"https://github.com/OpenPrinting/cups/commit/806e1b483096c51d59432468f4afdd7387d81dd7","label":"security-advisories@github.com"},{"url":"https://github.com/OpenPrinting/cups/commit/d41cf0616688721e9d435d54118c4c8a36ed596a","label":"security-advisories@github.com"},{"url":"https://github.com/OpenPrinting/cups/releases/tag/v2.4.20","label":"security-advisories@github.com"},{"url":"https://github.com/OpenPrinting/cups/security/advisories/GHSA-7hqf-mfhx-7r3v","label":"security-advisories@github.com"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-10-15T18:23:58.449Z","slug":"CVE-2026-55453","body":"## Overview\n\nOpenPrinting 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":18,"depthScoreParts":{"impact":18.2,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}