{"schema":"threatline.record/2","record":{"id":"CVE-2026-6103","aliases":["GHSA-j3wh-g957-2m85"],"summary":"Phar TAR phar_tar_number() Integer Overflow - Archive Entry Injection","details":"phar_tar_number() parses the octal size field of a TAR header into a uint32_t with no overflow check. The field is 11 octal digits wide and holds values up to 0x1FFFFFFFF, so a size above 0xFFFFFFFF silently wraps. The parser then skips the wrong number of data blocks and interprets attacker-controlled file content as the next TAR header, which lets a crafted archive inject entries that PharData reports and extracts as if they were genuine.","categories":["Runtimes & languages"],"product":"PHP","vendor":"PHP Group","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-6103","source_modified_at":"2026-09-25T20:41:27.115Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"PHP","vendor":"PHP Group","versions":[{"status":"affected","version":"8.2.*","lessThan":"8.2.34","versionType":"semver"},{"status":"affected","version":"8.3.*","lessThan":"8.3.35","versionType":"semver"},{"status":"affected","version":"8.4.*","lessThan":"8.4.26","versionType":"semver"},{"status":"affected","version":"8.5.*","lessThan":"8.5.11","versionType":"semver"}],"defaultStatus":"unaffected"},{"source":"GitHub Advisory 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