{"id":"DEBIAN-CVE-2026-55467","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.","modified":"2026-10-16T06:00:10.163109081Z","published":"2026-10-15T18:17:27.833Z","upstream":["CVE-2026-55467"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-55467"}],"affected":[{"package":{"name":"cups","ecosystem":"Debian:12","purl":"pkg:deb/debian/cups?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.4.10-1","2.4.10-2","2.4.10-3","2.4.10-4","2.4.14-1","2.4.15-1","2.4.16-1","2.4.17-1","2.4.18-1","2.4.2-3","2.4.2-3+deb12u1","2.4.2-3+deb12u2","2.4.2-3+deb12u3","2.4.2-3+deb12u4","2.4.2-3+deb12u5","2.4.2-3+deb12u6","2.4.2-3+deb12u7","2.4.2-3+deb12u8","2.4.2-3+deb12u9","2.4.2-4","2.4.2-5","2.4.2-6","2.4.20-1","2.4.7-1","2.4.7-1.1","2.4.7-1.2","2.4.7-2","2.4.7-3"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-55467.json"}},{"package":{"name":"cups","ecosystem":"Debian:13","purl":"pkg:deb/debian/cups?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.4.10-3","2.4.10-3+deb13u1","2.4.10-3+deb13u2","2.4.10-4","2.4.14-1","2.4.15-1","2.4.16-1","2.4.17-1","2.4.18-1","2.4.20-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-55467.json"}},{"package":{"name":"cups","ecosystem":"Debian:14","purl":"pkg:deb/debian/cups?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.4.10-3","2.4.10-4","2.4.14-1","2.4.15-1","2.4.16-1","2.4.17-1","2.4.18-1","2.4.20-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-55467.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L"}]}