{"id":"CVE-2026-66484","summary":"Path Traversal in GNU cpio","details":"GNU cpio contains a Path Traversal vulnerability in its tar archive extraction functionality. When extracting a tar archive in copy-in mode with the --no-absolute-filenames option, the extracted file name is normalized but the tar hard-link target is passed to the link_to_name function without equivalent sanitization before calling link function. A tar archive provided by an attacker, containing a hard-link entry whose linkname is set to an absolute path outside the extraction directory, can cause cpio to create a hard link to an existing file outside the intended extraction directory, breaking the expected guarantee of --no-absolute-filenames and allowing archive-controlled linkage to external files.\n\nThis issue has been fixed in commit e2b9cbdd3354d2b1569b7390d1bc15c1930559ad","modified":"2026-10-25T02:30:52.377050171Z","published":"2026-08-10T10:25:27.901Z","related":["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","openSUSE-SU-2026:11618-1","openSUSE-SU-2026:21747-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/66xxx/CVE-2026-66484.json","unresolved_ranges":[{"extracted_events":[{"range":[{"last_affected":"2.15"}],"source":"AFFECTED_FIELD","strategy":"StandardRange"}]},{"extracted_events":[{"range":[{"last_affected":"2.15"}],"source":"CPE_FIELD","strategy":"CPEApplicability"}]}],"cna_assigner":"CERT-PL","cwe_ids":["CWE-22"]},"references":[{"type":"ADVISORY","url":"https://cert.pl/en/posts/2026/08/CVE-2026-66484"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/66xxx/CVE-2026-66484.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-66484"},{"type":"PACKAGE","url":"https://git.savannah.gnu.org/cgit/cpio.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.savannah.gnu.org/cgit/cpio.git","events":[{"introduced":"0"},{"fixed":"e2b9cbdd3354d2b1569b7390d1bc15c1930559ad"}],"database_specific":{"extracted_events":[{"range":[{"introduced":"0"},{"fixed":"e2b9cbdd3354d2b1569b7390d1bc15c1930559ad"}],"source":"DESCRIPTION"},{"source":"DESCRIPTION","range":[{"introduced":"0"},{"last_affected":"e2b9cbdd3354d2b1569b7390d1bc15c1930559ad"}]}]}}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-66484.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:L/SA:N"}]}