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.
History

Thu, 22 Oct 2026 16:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Sat, 17 Oct 2026 04:15:00 +0000

Type Values Removed Values Added
First Time appeared Tinytag
Tinytag tinytag
Vendors & Products Tinytag
Tinytag tinytag

Fri, 16 Oct 2026 00:30:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

threat_severity

Moderate


Thu, 15 Oct 2026 17:30:00 +0000

Type Values Removed Values Added
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.
Title tinytag: Infinite loop when parsing certain M4A files containing invalid atoms
Weaknesses CWE-835
References
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2026-10-15T17:13:26.636Z

Updated: 2026-10-21T01:00:05.989Z

Reserved: 2026-10-01T19:04:39.707Z

Link: CVE-2026-104266

cve-icon Vulnrichment

Updated: 2026-10-21T00:59:59.515Z

cve-icon NVD

Status : Deferred

Published: 2026-10-15T18:17:22.983

Modified: 2026-10-21T01:17:19.640

Link: CVE-2026-104266

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-10-15T17:13:26Z

Links: CVE-2026-104266 - Bugzilla