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Vulnerability · Published Oct 8, 2026 · Assigned by GitHub_M

CVE-2026-107389music-metadata: EBML parser trusts element lengths, allowing memory exhaustion or process abort

Medium 6.2

In plain English

A medium-severity security flaw in music-metadata from Borewit. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 12% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)6.2Medium
Exploit odds (30 days)0.2%top 88.2% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known

Official description

music-metadata is a metadata parser for audio and video media files. Prior to 11.16.0, the Matroska and WebM EBML parser decodes an attacker-controlled VINT element length and uses it for string-token or Uint8Array allocation before confirming that the leaf fits within its parent or available input. Crafted WebM, MKV, or MKA inputs can cause disproportionate allocations, out-of-memory denial of service, or, for a demonstrated parseFile path on Node.js 26.7.0, an uncatchable V8 fatal abort. The exact failure mode depends on the tokenizer, parser API, and runtime, but the affected leaf-length validation flaw is shared and has availability impact only. This issue is fixed in version 11.16.0.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
npmmusic-metadata11.16.0GHSA-5gfj-9q3v-qfp3

Affected products (as reported)

VendorProductVersions
Borewit music-metadata < 11.16.0

Weakness: CWE-789 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References