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  5. CVE-2026-104266

CVE-2026-104266: tinytag: Infinite loop when parsing certain M4A files containing invalid atoms

October 15, 2026

An M4A file containing a sub-atom with a size of zero in the ---- atom makes the parser enter an infinite loop, resulting in a denial-of-service for programs reading such files with tinytag.

References

  • github.com/advisories/GHSA-24cc-9352-h2pg
  • github.com/tinytag/tinytag/commit/9ada221ba44990cb02cd9002d992186e037b515e
  • github.com/tinytag/tinytag/pull/326
  • github.com/tinytag/tinytag/releases/tag/2.3.0
  • github.com/tinytag/tinytag/security/advisories/GHSA-24cc-9352-h2pg
  • nvd.nist.gov/vuln/detail/CVE-2026-104266

Code Behaviors & Features

Detect and mitigate CVE-2026-104266 with GitLab Dependency Scanning

Secure your software supply chain by verifying that all open source dependencies used in your projects contain no disclosed vulnerabilities. Learn more about Dependency Scanning →

Affected versions

All versions starting from 2.0.0 before 2.3.0

Fixed versions

  • 2.3.0

Solution

Upgrade to version 2.3.0 or above.

Impact 6.5 MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Learn more about CVSS

Weakness

  • CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop')

Source file

pypi/tinytag/CVE-2026-104266.yml

Spotted a mistake? Edit the file on GitLab.

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