{"id":"CVE-2026-55453","revision":"03c737d146084cd9909ab06d1ff3e5ba","records":[{"revision":"03c737d146084cd9909ab06d1ff3e5ba","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-55453","aliases":[],"title":"CUPS ipp backend status-line injection can update queue PPD and lead to conditional RCE as lp via foomatic-rip","description":"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.","state":0,"publishedAt":"2026-10-15T17:11:21.208+00:00","modifiedAt":"2026-10-16T17:12:58.11+00:00","affected":[{"ecosystem":"Vendor product","name":"cups","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"OpenPrinting\",\n                    \"product\": \"cups\",\n                    \"versions\": [\n                        {\n                            \"version\": \"< 2.4.20\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L","score":3.3,"severity":"LOW"}],"references":["https://github.com/OpenPrinting/cups/security/advisories/GHSA-7hqf-mfhx-7r3v","https://github.com/OpenPrinting/cups/commit/806e1b483096c51d59432468f4afdd7387d81dd7","https://github.com/OpenPrinting/cups/commit/d41cf0616688721e9d435d54118c4c8a36ed596a","https://github.com/OpenPrinting/cups/releases/tag/v2.4.20"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-55453","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-55453","identifiers":["CVE-2026-55453"]},"retained":false,"historicalAffected":[]}],"coverage":[]}