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

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-104266
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-15 18:17:22 UTC
Updated2026-10-21 01:17:19 UTC
Descriptiontinytag 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.

Risk And Classification

Primary CVSS: v3.1 6.5 MEDIUM from [email protected]

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

EPSS: 0.002520000 probability, percentile 0.155660000 (date 2026-10-16)

Problem Types: CWE-835 | CWE-835 CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop')

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary6.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
3.1CNADECLARED6.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Tinytag Tinytag affected >= 2.0.0, < 2.3.0 Not specified

References

ReferenceSourceLinkTags
github.com/tinytag/tinytag/pull/326 [email protected] github.com
github.com/tinytag/tinytag/commit/9ada221ba44990cb02cd9002d992186e037b515e [email protected] github.com
github.com/tinytag/tinytag/releases/tag/2.3.0 [email protected] github.com
github.com/tinytag/tinytag/security/advisories/GHSA-24cc-9352-h2pg [email protected] github.com
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