music-metadata has an infinite loop vulnerability in ASF parser
Summary
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.
Root Cause
When objectSize is 0:
remaining = 0 - 24 = -24tokenizer.ignore(-24)moves the read position backward by 24 bytesextensionSize -= 0(loop counter never decreases)while (extensionSize > 0)never exits- The same 24-byte header is re-read infinitely
This is the same pattern as CVE-2026-31808 (GHSA-5v7r-6r5c-r473) in file-type — strtok3's AbstractTokenizer.ignore() accepts negative values without validation.
Affected Methods
parseFile()— HANGS (FileTokenizer inherits vulnerable ignore())parseBuffer()— HANGS (BufferTokenizer inherits vulnerable ignore())parseStream()— NOT affected (ReadStreamTokenizer has own ignore() that throws RangeError)
Impact
A 100-byte crafted .asf file permanently hangs any application using parseFile() or parseBuffer(). music-metadata has 2.2M weekly npm downloads.
Suggested Fix
Validate objectSize >= minimumHeaderSize before calculating the payload. Or fix strtok3's AbstractTokenizer.ignore() to reject negative values.
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| npm package | music-metadata | < 11.12.3 | 11.12.3 |
References
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H- Weakness (CWE)
CWE-835- Platform
- npm
- Package
music-metadata- Disclosed
- 17.03.2026
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-v6c2-xwv6-8xf7 - CC BY 4.0
Vulnerability history: music-metadata
All published vulnerabilities of this package (npm package), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 6
- First → latest
- 03.2026 10.2026
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- High 1
- Medium 5
Disclosures per year
- 2026: 6
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music-metadata has an infinite loop vulnerability in ASF parser this entry
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