{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "2.0.0"
              },
              {
                "fixed": "2.3.0"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "cc786892205f321a139412f830d714432b830f2f"
            },
            {
              "fixed": "9ada221ba44990cb02cd9002d992186e037b515e"
            },
            {
              "fixed": "912d27f5f65d6d1cc44ef6a9797d0d6d9e9d6b7d"
            }
          ],
          "repo": "https://github.com/tinytag/tinytag",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-24cc-9352-h2pg"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-835"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/104xxx/CVE-2026-104266.json"
  },
  "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.",
  "id": "CVE-2026-104266",
  "modified": "2026-10-17T02:30:33.515976124Z",
  "published": "2026-10-15T17:13:26.636Z",
  "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"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "tinytag: Infinite loop when parsing certain M4A files containing invalid atoms"
}