{"id":"CVE-2026-109380","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-109380","summary":"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…","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.","published":"2026-10-12T21:17:11.153","modified":"2026-10-12T21:17:11.153","cvss":{"score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[],"fix":{"url":"https://github.com/ayuhito/modern-tar/commit/181c8cb75351867535057817ada4802a90fe416e","label":"ayuhito/modern-tar@181c8cb"},"references":[{"type":"WEB","url":"https://github.com/ayuhito/modern-tar"},{"type":"WEB","url":"https://github.com/ayuhito/modern-tar/blob/v0.8.5/src/tar/encoding.ts"},{"type":"WEB","url":"https://github.com/ayuhito/modern-tar/commit/181c8cb75351867535057817ada4802a90fe416e"},{"type":"WEB","url":"https://github.com/ayuhito/modern-tar/pull/195"},{"type":"WEB","url":"https://www.vulncheck.com/advisories/modern-tar-0.3.5-through-0.8.5-memory-exhaustion-via-malformed-octal-size-field"}],"provenance":{"sources":["OSV.dev","NVD","FIRST.org (EPSS)"],"lastVerified":"2026-10-12T21:17:11.153"}}