{"id":"CVE-2026-111273","summary":"unarr through 1.1.1 Off-by-One Heap Buffer Overflow via tar_get_name","details":"unarr through 1.1.1 contains an off-by-one heap-based buffer overflow in tar_get_name() in tar/parse-tar.c, reachable through the ar_entry_get_name() API. Attackers can supply a crafted TAR archive with a full ustar prefix and name to write a NUL byte past the allocation, corrupting heap memory and crashing the process.","modified":"2026-10-21T02:55:10.521558399Z","published":"2026-10-15T21:43:19.717Z","database_specific":{"cwe_ids":["CWE-193"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/111xxx/CVE-2026-111273.json","cna_assigner":"VulnCheck"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/111xxx/CVE-2026-111273.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-111273"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/unarr-through-1.1.1-off-by-one-heap-buffer-overflow-via-tar-get-name"},{"type":"PACKAGE","url":"https://github.com/selmf/unarr"},{"type":"ARTICLE","url":"https://github.com/selmf/unarr/blob/b211040df83dee513362cdeb9bd87afa26fd5e38/tar/parse-tar.c#L242-L254"},{"type":"ARTICLE","url":"https://hackmd.io/@haind-pwn/unarr-tar-zip-oob"},{"type":"EVIDENCE","url":"https://hackmd.io/@haind-pwn/cve-2026-111273-111274-unarr-tar-zip-oob"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/selmf/unarr","events":[{"introduced":"0"},{"last_affected":"b211040df83dee513362cdeb9bd87afa26fd5e38"}],"database_specific":{"extracted_events":[{"strategy":"StandardRange","range":[{"introduced":"0"},{"last_affected":"1.1.1"}],"source":"AFFECTED_FIELD"},{"range":[{"introduced":"0"},{"last_affected":"1.1.1"}],"source":"DESCRIPTION"}]}}],"versions":["v1.1.1","v1.1.0","v1.1.0.beta1","v1.0.1","v1.0.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-111273.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N"}]}