{"schema":"threatline.record/2","record":{"id":"CVE-2026-55453","aliases":["GHSA-7hqf-mfhx-7r3v"],"summary":"CUPS ipp backend status-line injection can update queue PPD and lead to conditional RCE as lp via foomatic-rip","details":"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.","categories":["Unclassified"],"product":"cups","vendor":"OpenPrinting","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-55453","source_modified_at":"2026-10-16T17:12:58.110Z","fetched_at":"2026-10-23T18:48:36.087640Z","product":"cups","vendor":"OpenPrinting","versions":[{"status":"affected","version":"< 2.4.20"}],"defaultStatus":null},{"source":"GitHub Advisory Database","source_url":"https://github.com/OpenPrinting/cups/security/advisories/GHSA-7hqf-mfhx-7r3v","source_modified_at":"2026-10-05T14:04:51Z","fetched_at":"2026-10-24T05:41:33.294140Z","package":{"ecosystem":"","name":"cups"},"range":"<= 2.4.19"}],"fixed_versions":[{"source":"GitHub Advisory Database","source_url":"https://github.com/OpenPrinting/cups/security/advisories/GHSA-7hqf-mfhx-7r3v","source_modified_at":"2026-10-05T14:04:51Z","fetched_at":"2026-10-24T05:41:33.294140Z","package":{"ecosystem":"","name":"cups"},"version":"2.4.20"}],"cvss":3.3,"severity":"Low","kev":{"listed":false},"epss":{"probability":0.00201,"percentile":0.09464,"score_date":"2026-10-23"},"published_at":"2026-10-15T17:11:21.208Z","modified_at":"2026-10-16T17:12:58.110Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-55453","fetched_at":"2026-10-23T18:48:36.087640Z","source_modified_at":"2026-10-16T17:12:58.110Z"},{"source":"GitHub Advisory Database","url":"https://github.com/OpenPrinting/cups/security/advisories/GHSA-7hqf-mfhx-7r3v","fetched_at":"2026-10-24T05:41:33.294140Z","source_modified_at":"2026-10-05T14:04:51Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-55453","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","GitHub Advisory Database","EPSS"],"references":[{"source":"CVE List","url":"https://github.com/OpenPrinting/cups/security/advisories/GHSA-7hqf-mfhx-7r3v","tags":["x_refsource_CONFIRM"]},{"source":"CVE List","url":"https://github.com/OpenPrinting/cups/commit/806e1b483096c51d59432468f4afdd7387d81dd7","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/OpenPrinting/cups/commit/d41cf0616688721e9d435d54118c4c8a36ed596a","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/OpenPrinting/cups/releases/tag/v2.4.20","tags":["x_refsource_MISC"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","ssvc":{"exploitation":"none","automatable":"no","technical_impact":"partial","assessed_at":"2026-10-15T20:24:45.854455Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-10-16T17:12:58.110Z","content_hash":"bcb424ee40da8b9bd4cef6bad07978b09572aa0c4b5e2c30c0c46bbd5895c6e3"}}