{"id":"CVE-2026-104266","state":"PUBLISHED","title":"tinytag: Infinite loop when parsing certain M4A files containing invalid atoms","description":"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.","publishedAt":"2026-10-15T17:13:26.636Z","updatedAt":"2026-10-21T01:00:05.989Z","severity":{"score":6.5,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","source":"GitHub_M"},"assigner":"GitHub_M","products":["tinytag tinytag"],"affected":[{"vendor":"tinytag","product":"tinytag","versions":[{"version":">= 2.0.0, < 2.3.0","status":"affected"}]}],"references":["https://github.com/tinytag/tinytag/security/advisories/GHSA-24cc-9352-h2pg","https://github.com/tinytag/tinytag/pull/326","https://github.com/tinytag/tinytag/commit/9ada221ba44990cb02cd9002d992186e037b515e","https://github.com/tinytag/tinytag/releases/tag/2.3.0"],"weaknesses":["CWE-835"],"ingestedAt":"2026-10-29T20:10:23.711Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/104xxx/CVE-2026-104266.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-104266","state":"PUBLISHED","datePublished":"2026-10-15T17:13:26.636Z","dateUpdated":"2026-10-21T01:00:05.989Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-10-01T19:04:39.707Z"},"containers":{"cna":{"title":"tinytag: Infinite loop when parsing certain M4A files containing invalid atoms","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"tinytag","product":"tinytag","versions":[{"version":">= 2.0.0, < 2.3.0","status":"affected"}]}],"references":[{"url":"https://github.com/tinytag/tinytag/security/advisories/GHSA-24cc-9352-h2pg","name":"https://github.com/tinytag/tinytag/security/advisories/GHSA-24cc-9352-h2pg","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/tinytag/tinytag/pull/326","name":"https://github.com/tinytag/tinytag/pull/326","tags":["x_refsource_MISC"]},{"url":"https://github.com/tinytag/tinytag/commit/9ada221ba44990cb02cd9002d992186e037b515e","name":"https://github.com/tinytag/tinytag/commit/9ada221ba44990cb02cd9002d992186e037b515e","tags":["x_refsource_MISC"]},{"url":"https://github.com/tinytag/tinytag/releases/tag/2.3.0","name":"https://github.com/tinytag/tinytag/releases/tag/2.3.0","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":6.5,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-835","lang":"en","description":"CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop')","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-10-15T17:13:26.636Z"},"source":{"advisory":"GHSA-24cc-9352-h2pg","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-10-21T00:59:51.994856Z","id":"CVE-2026-104266","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-10-21T01:00:05.989Z"}}]}}}