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

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS

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

EPSS

• CVE-2026-107391: 0.32% estimated exploitation activity in the next 30 days; percentile 24.61 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

Summary StsdAtom.get() in lib/mp4/AtomToken.ts parses an MP4 stsd (sample description) box's entry table by advancing a cursor with off += size - 4, where size is a 32-bit, attacker-controlled per-entry length read straight from the file. When size == 0, that advance is 0, so a file declaring a huge entrycount and a first entry size of 0 spins forever: same bytes read every iteration, no progress, no exit. Because StsdAtom.get runs synchronously inside strtok3's tokenizer, this doesn't just fail slowly — it blocks the Node.js event loop entirely for the whole process. A 48-byte file is enough to hang any service that parses user-uploaded audio/video metadata through parseBuffer, parseFile, parseStream, parseBlob, or parseWebStream. This is currently unreleased — present on the master branch only, not in the latest npm release (11.14.0) or any earlier one. Reporting now, before it ships. Details lib/mp4/AtomToken.ts, StsdAtom.get(): - Introduced by commit d2a7d6f ("fix(mp4): locate…

Published by the source

8 Oct 2026, 19:43 UTC

Last modified by the source

8 Oct 2026, 20:00 UTC

Source last checked

26 Oct 2026, 13:07 UTC

1. Revision 3 · amended · 26 Oct 2026

   Amended from ghsa record GHSA-f94x-6692-553q

2. Revision 2 · amended · 24 Oct 2026

   Amended from osv record GHSA-f94x-6692-553q

3. Revision 1 · created · 23 Oct 2026

   Published from ghsa record GHSA-f94x-6692-553q

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# Patch Next advisory brief: CVE-2026-107391

Advisory: music-metadata: MP4 stsd sample-entry size==0 causes a synchronous infinite loop (DoS) — unreleased regression on master
IDs: CVE-2026-107391, GHSA-f94x-6692-553q
Record: https://patchnext.com/advisories/cve-2026-107391 (revision 3, source checked 26 Oct 2026, 13:07 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Medium (CVSS 6.2)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: music-metadata 11.16.0. A vendor fix does not mean a deployment is fixed.

## Affected components
- npm music-metadata: affected < 11.16.0; fixed in 11.16.0

## Suggested inspection (read-only)
- `npm ls music-metadata --all`: lists every installed copy and version, including transitive ones. Run in the project root after `npm ci`.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on music-metadata.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://github.com/advisories/GHSA-f94x-6692-553q (GitHub-reviewed advisory GHSA-f94x-6692-553q lists affected ranges: npm music-metadata >=0 <11.16.0)
- Verified: https://osv.dev/vulnerability/GHSA-f94x-6692-553q (OSV record GHSA-f94x-6692-553q lists affected ranges: npm music-metadata >=0 <11.16.0 (fixed))

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