{"id":"CVE-2026-104266","aliases":["GHSA-24cc-9352-h2pg"],"url":"https://o3.security/vulnerability/CVE-2026-104266","summary":"tinytag: Infinite loop when parsing certain M4A files containing invalid atoms","details":"tinytag is a Python library for reading audio file metadata. From 2.0.0 until 2.3.0, an M4A file containing a sub-atom with a size of zero inside a ---- atom can cause the metadata parser to stop advancing through the input. The custom-field atom traversal repeatedly processes the malformed location, causing an infinite loop and denying service to a program that reads the crafted file. This issue is fixed in version 2.3.0.","published":"2026-10-15T17:13:26.636Z","modified":"2026-10-21T10:30:59.276532210Z","cvss":{"score":6.5,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"PyPI","name":"tinytag","fixedVersion":"2.3.0"}],"fix":{"url":"https://github.com/tinytag/tinytag/commit/9ada221ba44990cb02cd9002d992186e037b515e","label":"tinytag/tinytag@9ada221"},"references":[{"type":"WEB","url":"https://github.com/tinytag/tinytag/releases/tag/2.3.0"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/104xxx/CVE-2026-104266.json"},{"type":"ADVISORY","url":"https://github.com/tinytag/tinytag/security/advisories/GHSA-24cc-9352-h2pg"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-104266"},{"type":"FIX","url":"https://github.com/tinytag/tinytag/commit/9ada221ba44990cb02cd9002d992186e037b515e"},{"type":"FIX","url":"https://github.com/tinytag/tinytag/pull/326"},{"type":"PACKAGE","url":"https://github.com/tinytag/tinytag"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-10-21T10:30:59.276532210Z"}}