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CVE-2026-32256

music-metadata has an infinite loop vulnerability in ASF parser

7.5 HighFix available

CVE-2026-32256 is a high vulnerability (CVSS 7.5) in Borewit Music-metadata, published March 17, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.45%, the 39th percentile. Fixed in music-metadata 11.12.3.

What does this mean?
Severity
7.5 HighCVSS 3.1, CVE List
Exploit chance
0.45%EPSS, 39th percentile
Exploitation
None knownNot on CISA’s or ENISA’s lists
Fixed in
11.12.3music-metadata +1 more

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.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
None
Integrity
None
Availability
High

Exploit likelihood

0.45%Up 0.4 points since Mar 18, 2026
90%50%10%1%

Affected products

Affected packages

Affected packages
PackageAffectedFixed
music-metadata
npm
through 11.12.1
11.12.3
music-metadata
npm
before 11.12.3
11.12.3

What each source reports

CVE List Score used7.5

music-metadata has an infinite loop vulnerability in ASF parser

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.

Record
CVE-2026-32256
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-835
Updated
2026-11-02
EUVDEUVD-2026-127677.5

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.

Record
EUVD-2026-12767
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
GitHub AdvisoriesGHSA-v6c2-xwv6-8xf77.5

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:

  1. remaining = 0 - 24 = -24
  2. tokenizer.ignore(-24) moves the read position backward by 24 bytes
  3. extensionSize -= 0 (loop counter never decreases)
  4. while (extensionSize > 0) never exits
  5. 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.

Record
GHSA-v6c2-xwv6-8xf7
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-835
Updated
2026-11-02
NVD7.5

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.

Record
CVE-2026-32256
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-835
Updated
2026-11-02
OSV7.5

music-metadata has an infinite loop vulnerability in ASF parser

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.

Record
CVE-2026-32256
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-835
Updated
2026-11-02
OSVGHSA-v6c2-xwv6-8xf77.5

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:

  1. remaining = 0 - 24 = -24
  2. tokenizer.ignore(-24) moves the read position backward by 24 bytes
  3. extensionSize -= 0 (loop counter never decreases)
  4. while (extensionSize > 0) never exits
  5. 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.

Record
GHSA-v6c2-xwv6-8xf7
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-835
Updated
2026-11-02

History

History
RecordedChangedSources
first indexedCVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

References

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