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OpenAdvisories
Medium · 6.5 CVE-2026-104266 EUVD-2026-102209GHSA-24cc-9352-h2pg

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

Published Oct 15, 2026 · Updated Oct 21, 2026 · Assigned by GitHub_M

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.

Affected products

VendorProductAffectedFixed
tinytag tinytag >= 2.0.0, < 2.3.0 —

Fixed in Linux distributions

Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.

ReleasePackageFixed inAdvisory
Debian 14 python-tinytag 2.3.0-1 —
ReleasePackageFixed inAdvisory
Ubuntu 26.10 python-tinytag No fix yet —

Affected packages

EcosystemPackageAffectedFixedRecord
PyPI tinytag >= 2.0.0, < 2.3.0 2.3.0 GHSA-24cc-9352-h2pg

References