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CVE-2026-32889: Denial of service via non-terminating SYLT frame parsing loop in tinytag

March 19, 2026 (updated March 20, 2026)

tinytag 2.2.0 allows an attacker who can supply MP3 files for parsing to trigger a non-terminating loop while the library parses an ID3v2 SYLT (synchronized lyrics) frame. In server-side deployments that automatically parse attacker-supplied files, a single 498-byte MP3 can cause the parsing operation to stop making progress and remain busy until the worker or process is terminated.

References

  • github.com/advisories/GHSA-f4rq-2259-hv29
  • github.com/tinytag/tinytag
  • github.com/tinytag/tinytag/commit/44e496310f7ced8077e9087e3774acbaa324b18a
  • github.com/tinytag/tinytag/commit/4d649b9c314ada8ff8a74e0469e9aadb3acb252a
  • github.com/tinytag/tinytag/commit/5cd321521ff097e41724b601d7e3d7adc7e53402
  • github.com/tinytag/tinytag/security/advisories/GHSA-f4rq-2259-hv29
  • nvd.nist.gov/vuln/detail/CVE-2026-32889

Code Behaviors & Features

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Affected versions

All versions before 2.2.1

Fixed versions

  • 2.2.1

Solution

Upgrade to version 2.2.1 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-2026-32889.yml

Spotted a mistake? Edit the file on GitLab.

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