{"schema":"threatline.record/2","record":{"id":"CVE-2026-109380","aliases":[],"summary":"modern-tar 0.3.5 through 0.8.5 Memory Exhaustion via Malformed Octal Size Field","details":"modern-tar 0.3.5 through 0.8.5 contains a memory exhaustion vulnerability that allows attackers to produce negative entry sizes via non-octal bytes parsed by readOctal(). Attackers can supply a crafted, optionally gzip-compressed, archive to unpackTar() that buffers chunks indefinitely, exhausting process memory and suppressing later entries.","categories":["Unclassified"],"product":"modern-tar","vendor":"ayuhito","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-109380","source_modified_at":"2026-10-13T15:40:11.463Z","fetched_at":"2026-10-23T18:48:36.087640Z","product":"modern-tar","vendor":"ayuhito","versions":[{"version":"0.3.5","status":"affected","versionType":"semver","lessThanOrEqual":"0.8.5"}],"defaultStatus":"unaffected"}],"fixed_versions":[],"cvss":8.7,"severity":"High","kev":{"listed":false},"epss":{"probability":0.00446,"percentile":0.37814,"score_date":"2026-10-23"},"published_at":"2026-10-12T20:55:11.774Z","modified_at":"2026-10-13T15:40:11.463Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-109380","fetched_at":"2026-10-23T18:48:36.087640Z","source_modified_at":"2026-10-13T15:40:11.463Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-109380","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://github.com/ayuhito/modern-tar/pull/195","tags":["issue-tracking","patch"]},{"source":"CVE List","url":"https://github.com/ayuhito/modern-tar/commit/181c8cb75351867535057817ada4802a90fe416e","tags":["patch"]},{"source":"CVE List","url":"https://github.com/ayuhito/modern-tar/blob/v0.8.5/src/tar/encoding.ts","tags":["technical-description"]},{"source":"CVE List","url":"https://github.com/ayuhito/modern-tar","tags":["product"]},{"source":"CVE List","url":"https://www.vulncheck.com/advisories/modern-tar-0.3.5-through-0.8.5-memory-exhaustion-via-malformed-octal-size-field","tags":["third-party-advisory"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","ssvc":{"exploitation":"none","automatable":"yes","technical_impact":"partial","assessed_at":"2026-10-13T15:39:56.714376Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":null,"confidence":"unknown","reviewed":false},"change_timestamp":"2026-10-13T15:40:11.463Z","content_hash":"f0e67f412cd99e843f4afb95308b7d0fe3628c69c7dcacc92ee095e6a2b9e9b5"}}