{"schemaVersion":3,"id":"CVE-2026-66486","aliases":["UBUNTU-CVE-2026-66486","DEBIAN-CVE-2026-66486"],"status":"published","duplicateOf":null,"title":null,"description":"GNU cpio is vulnerable to improper encoding or escaping of output in its archive member listing functionality. When listing archive members via cpio -it, member names are printed directly to output without quoting or escaping. 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Encoding or Escaping of Output","description":"The product prepares a structured message for communication with another component, but encoding or escaping of the data is either missing or done incorrectly. As a result, the intended structure of the message is not preserved.","type":"weakness","status":"Draft","abstraction":"Class","likelihoodOfExploit":"High","url":"https://cwe.mitre.org/data/definitions/116.html"}],"affected":[{"vendor":"debian","product":"cpio","name":"cpio","label":"cpio","ecosystem":"Debian","cpePart":null,"purl":"pkg:deb/debian/cpio","purlType":"deb","versions":[{"text":"All versions","noFixRecorded":true,"fixedIn":null}],"versionsText":"All versions (No fix recorded)","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"cpio","name":"cpio","label":"cpio","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/cpio","purlType":"deb","versions":[{"text":"< 2.11+dfsg-1ubuntu1.2+esm3","noFixRecorded":false,"fixedIn":null},{"text":"< 2.11+dfsg-5ubuntu1.1+esm2","noFixRecorded":false,"fixedIn":null},{"text":"< 2.12+dfsg-6ubuntu0.18.04.4+esm1","noFixRecorded":false,"fixedIn":null},{"text":"< 2.13+dfsg-2ubuntu0.4+esm1","noFixRecorded":false,"fixedIn":null},{"text":"< 2.13+dfsg-7ubuntu0.2","noFixRecorded":false,"fixedIn":null},{"text":"< 2.15+dfsg-1ubuntu2.1","noFixRecorded":false,"fixedIn":null},{"text":"< 2.15+dfsg-2.1ubuntu0.1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 2.11+dfsg-1ubuntu1.2+esm3 | < 2.11+dfsg-5ubuntu1.1+esm2 | < 2.12+dfsg-6ubuntu0.18.04.4+esm1 | < 2.13+dfsg-2ubuntu0.4+esm1 | < 2.13+dfsg-7ubuntu0.2 | < 2.15+dfsg-1ubuntu2.1 | < 2.15+dfsg-2.1ubuntu0.1","eol":null,"hubHref":null},{"vendor":"gnu","product":"cpio","name":"cpio","label":"cpio","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≤ 2.15","noFixRecorded":false,"fixedIn":null}],"versionsText":"≤ 2.15","eol":null,"hubHref":"/vendor/gnu/cpio"}],"affectedCount":3,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://cert.pl/en/posts/2026/08/CVE-2026-66484","label":"cert.pl/en/posts/2026/08/CVE-2026-66484","hostname":"cert.pl","tags":["Third Party Advisory","REPORT"]},{"url":"https://git.savannah.gnu.org/cgit/cpio.git","label":"git.savannah.gnu.org/cgit/cpio.git","hostname":"git.savannah.gnu.org","tags":["Product","REPORT"]},{"url":"https://ubuntu.com/security/CVE-2026-66486","label":"ubuntu.com/security/CVE-2026-66486","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-66486","label":"www.cve.org/CVERecord?id=CVE-2026-66486","hostname":"www.cve.org","tags":["REPORT"]},{"url":"https://ubuntu.com/security/notices/USN-8704-1","label":"ubuntu.com/security/notices/USN-8704-1","hostname":"ubuntu.com","tags":["Advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-66486","label":"security-tracker.debian.org/tracker/CVE-2026-66486","hostname":"security-tracker.debian.org","tags":["Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-66486","label":"nvd.nist.gov/vuln/detail/CVE-2026-66486","hostname":"nvd.nist.gov","tags":["Oval","Advisory"]}],"lineage":{"upstream":[],"downstream":["MGASA-2026-0435","OPENSUSE-SU-2026:11618-1","OPENSUSE-SU-2026:21747-1","SUSE-SU-2026:23355-1","SUSE-SU-2026:23441-1","SUSE-SU-2026:23464-1","SUSE-SU-2026:23612-1","SUSE-SU-2026:3959-1","SUSE-SU-2026:4012-1","USN-8704-1"],"duplicates":[],"related":["OPENSUSE-SU-2026:11618-1","OPENSUSE-SU-2026:21747-1","SUSE-SU-2026:23355-1","SUSE-SU-2026:23441-1","SUSE-SU-2026:23464-1","SUSE-SU-2026:23612-1","SUSE-SU-2026:3959-1","SUSE-SU-2026:4012-1","USN-8704-1"]},"timeline":[{"kind":"published","date":"2026-08-10T10:25:41.625Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-08-10T10:35:09.032Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":18,"level":"low","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-19T18:17:20.827Z","stale":false,"partial":false}}