{"schemaVersion":3,"id":"CVE-2026-61702","aliases":["UBUNTU-CVE-2026-61702","DEBIAN-CVE-2026-61702"],"status":"published","duplicateOf":null,"title":null,"description":"OpenPrinting CUPS is an open source printing system for Linux and other Unix-like operating systems. Prior to 2.4.20, copy_banner() in scheduler/ipp.c uses the attacker-controlled IPP attributes-natural-language value as a directory component beneath DataDir/banners when processing a job-sheets banner. The job-sheets value must first match a registered banner basename, and the traversed path must contain a matching reachable basename; selecting an arbitrary target as demonstrated additionally requires pre-positioned path state such as a symlink with that basename. Subject to the scheduler's filesystem and sandbox access, path separators in the language value can escape the intended banner directory, make the root scheduler open the reachable file, and copy its bytes into a job-sheet spool object that a configured backend can deliver to an attacker-observable endpoint. This issue is fixed in version 2.4.20.","dates":{"published":"2026-10-15T17:12:10.695Z","modified":"2026-10-15T17:12:10.695Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":5.3,"severity":"medium","version":"3.1","versionLabel":"v3.1","source":"CVE.org","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","score":5.3,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":5.3,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Debian","score":5.3,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","exploitability":10,"impact":2.3,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Ubuntu","score":5.3,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","exploitability":10,"impact":2.3,"computed":true}]},"epss":{"probability":0.00452,"percentile":0.37906,"severity":"low","asOf":"2026-10-19T00:00:00.000Z","change":{"pp":null,"baselineDate":null,"baselineScore":null},"history":[{"date":"2026-10-16T00:00:00.000Z","score":0.00452,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00452,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00452,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00452,"percentile":0.37906}],"last30":[{"date":"2026-10-16T00:00:00.000Z","score":0.00452,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00452,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00452,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00452,"percentile":0.37906}]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[],"exploitCount":0,"weaknesses":[{"id":"CWE-22","name":"Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')","description":"The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.","type":"weakness","status":"Stable","abstraction":"Base","likelihoodOfExploit":"High","url":"https://cwe.mitre.org/data/definitions/22.html"}],"affected":[{"vendor":"debian","product":"cups","name":"cups","label":"cups","ecosystem":"Debian","cpePart":null,"purl":"pkg:deb/debian/cups","purlType":"deb","versions":[{"text":"All versions","noFixRecorded":true,"fixedIn":null}],"versionsText":"All versions (No fix recorded)","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"cups","name":"cups","label":"cups","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/cups","purlType":"deb","versions":[{"text":"All versions","noFixRecorded":true,"fixedIn":null}],"versionsText":"All versions (No fix recorded)","eol":null,"hubHref":null},{"vendor":"openprinting","product":"cups","name":"cups","label":"cups","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"< 2.4.20","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 2.4.20","eol":null,"hubHref":"/vendor/openprinting/cups"}],"affectedCount":3,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://ubuntu.com/security/CVE-2026-61702","label":"ubuntu.com/security/CVE-2026-61702","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-61702","label":"www.cve.org/CVERecord?id=CVE-2026-61702","hostname":"www.cve.org","tags":["REPORT"]},{"url":"https://github.com/OpenPrinting/cups/security/advisories/GHSA-gq9p-4w7m-2f5g","label":"github.com/OpenPrinting/cups/security/advisories/GHSA-gq9p-4w7m-2f5g","hostname":"github.com","tags":["REPORT","X Refsource CONFIRM"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-61702","label":"security-tracker.debian.org/tracker/CVE-2026-61702","hostname":"security-tracker.debian.org","tags":["Advisory"]},{"url":"https://github.com/OpenPrinting/cups/commit/08a8a277ce2a8948a1af33552247a1ac53b72df3","label":"github.com/OpenPrinting/cups/commit/08a8a277ce2a8948a1af33552247a1ac53b72df3","hostname":"github.com","tags":["X Refsource MISC"]},{"url":"https://github.com/OpenPrinting/cups/commit/6650428234616a97d3298e0e2d4419c62c1339d2","label":"github.com/OpenPrinting/cups/commit/6650428234616a97d3298e0e2d4419c62c1339d2","hostname":"github.com","tags":["X Refsource MISC"]},{"url":"https://github.com/OpenPrinting/cups/releases/tag/v2.4.20","label":"github.com/OpenPrinting/cups/releases/tag/v2.4.20","hostname":"github.com","tags":["X Refsource MISC"]}],"lineage":{"upstream":[],"downstream":["MGASA-2026-0483"],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2026-10-15T17:12:10.695Z","label":"Published","detail":"Vulnerability first disclosed.","source":null}],"risk":{"score":21,"level":"low","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-19T19:08:06.156Z","stale":false,"partial":false}}