ZDF
Sign inSign up

Vulnerabilities

Vulnerability · CVE-2026-104266

tinytag is a Python library for reading audio file metadata.

Published Oct 15, 2026 · catalog updated Oct 15, 2026 · tinytag is a Python

Check if you run it

No confirmed exploitation is on record for CVE-2026-104266. EPSS is 0.25%. Act only if a listed version of tinytag is a Python is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (tinytag is a Python).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Medium6.5
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.25%
Remediation
Version ranges on file
Affected products
PyPI tinytag · pip tinytag · pypi tinytag

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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • PyPI tinytag2.0.0 → 2.3.0
  • pip tinytag>= 2.0.0, < 2.3.0
  • pypi tinytagversion unspecified

How to fix CVE-2026-104266

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-104266. EPSS is 0.25%. Act only if a listed version of tinytag is a Python is installed.

Which versions are affected?

Compare what you have installed with 2.0.0 → 2.3.0, >= 2.0.0, < 2.3.0. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-835: Infinite Loop. EPSS 0.25%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Oct 15, 2026 · NIST NVD

    Detected

    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

  2. Oct 15, 2026 · GitHub Advisory Database

    Fix available

    tinytag fixed in 2.3.0

  3. Oct 15, 2026 · GitHub Advisory Database

    Fix available

    tinytag fixed in 2.3.0

  4. Oct 15, 2026 · GitHub Advisory Database

    Updated

    ### Impact An M4A file containing a sub-atom with a size of zero in the atom makes the parser enter an infinite loop, resulting in a denial-of-service for programs reading such files with tinytag. ### Patches The issue has been fixed in tinytag 2.3.0, by reusing the primary atom parsing code path that contains appropriate size checks. ### Workarounds No workarounds exist. Users must upgrade to tin

Sources

  • CVE.orgVulnerability recordCVE-2026-104266

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-104266

    30-day exploitation probability 0.3%

    first.org
  • GitHub Advisory DatabasePackage advisoryGHSA-24cc-9352-h2pg

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

    github.com
  • GitLab Advisory DatabasePackage advisoryCVE-2026-104266

    An M4A file containing a sub-atom with a size of zero in the &mdash;- atom makes the parser enter an infinite loop, resulting in a denial-of-service for programs reading such files with tinytag.

    advisories.gitlab.com
  • NIST NVDVulnerability recordCVE-2026-104266

    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 th

    nvd.nist.gov
  • OpenSSF OSV / OSV ScannerPackage advisoryGHSA-24cc-9352-h2pg

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

    osv.dev

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.