CVE-2026-32256: music-metadata has an infinite loop vulnerability in ASF parser

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-03-18 · updated 2026-06-17
Weakness: CWE-835

Description

music-metadata is a metadata parser for audio and video media files. Prior to version 11.12.3, music-metadata's ASF parser (`parseExtensionObject()` in `lib/asf/AsfParser.ts:112-158`) enters an infinite loop when a sub-object inside the ASF Header Extension Object has `objectSize = 0`. Version 11.12.3 fixes the issue.

Affected products

Borewit music-metadata: before 11.12.3 — fixed in 11.12.3

How to fix

Upgrade to a fixed version: Borewit music-metadata 11.12.3. Check the vendor advisory for mitigations.

References

https://github.com/Borewit/music-metadata/releases/tag/v11.12.3
https://github.com/Borewit/music-metadata/security/advisories/GHSA-v6c2-xwv6-8xf7

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