{"schema":"threatline.record/2","record":{"id":"CVE-2026-55467","aliases":["GHSA-69qc-prxg-h2c7"],"summary":"CUPS fax option values bypass the CVE-2026-34980 control-character sanitizer (incomplete fix)","details":"OpenPrinting CUPS is an open source printing system for Linux and other Unix-like operating systems. Prior to 2.4.20, the cupsdCreateJob option-string builder in scheduler/job.c maps attacker-controlled destination-uri and pre-dial-string values from a configured fax queue to the phone and faxPrefix options. Unlike ordinary IPP job attributes, these mapped fax values bypass the control-character sanitizer and are copied directly into the filter options argument. A user permitted to submit a job can therefore inject control characters into the downstream option stream. The reporter states that a downstream fax filter passing these values to a shell or modem command could execute code as lp, while the maintainer states that CUPS has no confidentiality or integrity impact because the only known code-executing filter is optional Foomatic and addressed separately, leaving possible disruption of the affected queue. 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-2026-55467","source_modified_at":"2026-10-15T17:49:26.673Z","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-69qc-prxg-h2c7","source_modified_at":"2026-10-05T14:05:07Z","fetched_at":"2026-10-23T19:00:29.328130Z","package":{"ecosystem":"","name":"https://github.com/OpenPrinting/cups"},"range":"<=2.4.19"}],"fixed_versions":[{"source":"GitHub Advisory Database","source_url":"https://github.com/OpenPrinting/cups/security/advisories/GHSA-69qc-prxg-h2c7","source_modified_at":"2026-10-05T14:05:07Z","fetched_at":"2026-10-23T19:00:29.328130Z","package":{"ecosystem":"","name":"https://github.com/OpenPrinting/cups"},"version":"2.4.20"}],"cvss":2.5,"severity":"Low","kev":{"listed":false},"epss":{"probability":0.00176,"percentile":0.06795,"score_date":"2026-10-23"},"published_at":"2026-10-15T17:08:24.374Z","modified_at":"2026-10-15T17:49:26.673Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-55467","fetched_at":"2026-10-23T18:48:36.087640Z","source_modified_at":"2026-10-15T17:49:26.673Z"},{"source":"GitHub Advisory Database","url":"https://github.com/OpenPrinting/cups/security/advisories/GHSA-69qc-prxg-h2c7","fetched_at":"2026-10-23T19:00:29.328130Z","source_modified_at":"2026-10-05T14:05:07Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-55467","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-69qc-prxg-h2c7","tags":["exploit"]},{"source":"CVE List","url":"https://github.com/OpenPrinting/cups/commit/0cf4e7814d6810ed3c454222bce3aa342d541681","tags":["x_refsource_MISC"]},{"source":"CVE List","url":"https://github.com/OpenPrinting/cups/commit/a9e7e7a3a019d0fa063d29409d3f82e4c6d5a008","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":"poc","automatable":"no","technical_impact":"partial","assessed_at":"2026-10-15T17:49:04.144102Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-10-15T17:49:26.673Z","content_hash":"4d0a55e44bb4c076937e2d2bf2713024c552ce24f5362ae4c8bcd878baf2bec3"}}