{"id":"CVE-2026-111273","title":"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","summary":"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 wr…","severity":"medium","cvss":6.1,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H","cwe":["CWE-193"],"vendor":"selmf","product":"unarr","affected":["unarr <= 1.1.1"],"published":"2026-10-15","updated":"2026-10-16","sourceUpdated":"2026-10-16T20:17:19.853","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-111273","references":[{"url":"https://github.com/selmf/unarr","label":"disclosure@vulncheck.com"},{"url":"https://github.com/selmf/unarr/blob/b211040df83dee513362cdeb9bd87afa26fd5e38/tar/parse-tar.c#L242-L254","label":"disclosure@vulncheck.com"},{"url":"https://hackmd.io/@haind-pwn/unarr-tar-zip-oob","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/unarr-through-1.1.1-off-by-one-heap-buffer-overflow-via-tar-get-name","label":"disclosure@vulncheck.com"},{"url":"https://hackmd.io/@haind-pwn/cve-2026-111273-111274-unarr-tar-zip-oob","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"tags":["nvd","cve.org","exploit-available"],"epss":0.00209,"epssPercentile":0.10992,"exploitAvailable":true,"ssvc":{"exploitation":"poc","automatable":"no","technicalImpact":"partial","timestamp":"2026-10-16T19:38:21.654864Z"},"ingestedAt":"2026-10-15T22:48:25.447Z","slug":"CVE-2026-111273","body":"## Overview\n\nunarr 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":46,"depthScoreParts":{"impact":33.6,"likelihood":0,"exploitation":12,"ransomware":0},"changes":[{"seq":223390,"id":"CVE-2026-111273","ts":1792183974363,"field":"exploit_available","old":"false","new":"true"}]}