{"schema":"threatline.record/2","record":{"id":"CVE-2026-111273","aliases":[],"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.","categories":["Unclassified"],"product":"unarr","vendor":"selmf","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-111273","source_modified_at":"2026-10-16T19:39:08.849Z","fetched_at":"2026-10-23T18:48:36.087640Z","product":"unarr","vendor":"selmf","versions":[{"version":"0","lessThanOrEqual":"1.1.1","status":"affected","versionType":"semver"}],"defaultStatus":"unaffected"}],"fixed_versions":[],"cvss":6.9,"severity":"Medium","kev":{"listed":false},"epss":{"probability":0.00143,"percentile":0.03302,"score_date":"2026-10-23"},"published_at":"2026-10-15T21:43:19.717Z","modified_at":"2026-10-16T19:39:08.849Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-111273","fetched_at":"2026-10-23T18:48:36.087640Z","source_modified_at":"2026-10-16T19:39:08.849Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-111273","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://hackmd.io/@haind-pwn/unarr-tar-zip-oob","tags":["technical-description"]},{"source":"CVE List","url":"https://github.com/selmf/unarr/blob/b211040df83dee513362cdeb9bd87afa26fd5e38/tar/parse-tar.c#L242-L254","tags":["technical-description"]},{"source":"CVE List","url":"https://github.com/selmf/unarr","tags":["product"]},{"source":"CVE List","url":"https://www.vulncheck.com/advisories/unarr-through-1.1.1-off-by-one-heap-buffer-overflow-via-tar-get-name","tags":["third-party-advisory"]},{"source":"CVE List","url":"https://hackmd.io/@haind-pwn/cve-2026-111273-111274-unarr-tar-zip-oob","tags":["exploit"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","ssvc":{"exploitation":"poc","automatable":"no","technical_impact":"partial","assessed_at":"2026-10-16T19:38:21.654864Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-10-16T19:39:08.849Z","content_hash":"9f4f09385525986b0dd1e97351aaa65588696aa5c6fedcdce990e63111c5bce1"}}