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Advisory record · GHSA-24cc-9352-h2pg

tinytag: Infinite loop when parsing certain M4A files containing invalid atoms

CVSS 6.5 MediumEPSS 0.0033 · 26th percentile

Published by the GitHub Advisory Database at 15 Oct 2026, 20:16 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
tinytagPyPI>=2.0.0, <2.3.02.3.0
Identifiers
GHSA-24cc-9352-h2pg · CVE-2026-104266
Weakness (CWE)
CWE-835
Tags
Published
15 Oct 2026
Updated
15 Oct 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

The tinytag package, versions 2.0.0 up to but not including 2.3.0, can enter an infinite loop when parsing certain M4A files that contain a sub-atom with a size of zero inside a `----` atom. An attacker who can supply such a file to a program that reads it with tinytag can cause a denial of service. Upgrade to tinytag 2.3.0, which fixes the issue; the source lists no workarounds.

Written 1 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
6.5 Medium 3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0033, the 26th percentile, on 7 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:08 UTC First seen by agentprime
  2. 31 Oct 2026, 14:08 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.