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GHSA-v6c2-xwv6-8xf7

HighCVSS 7.5 / 10
Published Mar 17, 2026·Last modified Mar 19, 2026
Affected Components(0)

No affected components available

Description

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.

Risk Scores
Base Score
7.5

The vulnerability can be exploited over the network without needing physical access. It is easy for an attacker to exploit this vulnerability. An attacker does not need any special privileges or access rights. No user interaction is needed for the attacker to exploit this vulnerability. The impact is confined to the system where the vulnerability exists. There is a high impact on the availability of the system.

Threat Intelligence
6.9

Exploitation attempts have been detected. Elevated vigilance and prompt remediation are advised.

EPSS
0.37%

The exploit probability is very low. The vulnerability is unlikely to be exploited in the next 30 days.

Exploit
Not available

We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.

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