GHSA-V6C2-XWV6-8XF7

Vulnerability from github – Published: 2026-03-17 20:04 – Updated: 2026-03-19 21:00
VLAI?
Summary
music-metadata has an infinite loop vulnerability in ASF parser
Details

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.

Severity ?
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 11.12.1"
      },
      "package": {
        "ecosystem": "npm",
        "name": "music-metadata"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "11.12.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-32256"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-835"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-03-17T20:04:48Z",
    "nvd_published_at": "2026-03-18T04:17:25Z",
    "severity": "HIGH"
  },
  "details": "# Summary\n\nmusic-metadata\u0027s 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`.\n\n## Root Cause\n\nWhen objectSize is 0:\n1. `remaining = 0 - 24 = -24`\n2. `tokenizer.ignore(-24)` moves the read position backward by 24 bytes\n3. `extensionSize -= 0` (loop counter never decreases)\n4. `while (extensionSize \u003e 0)` never exits\n5. The same 24-byte header is re-read infinitely\n\nThis is the same pattern as CVE-2026-31808 (GHSA-5v7r-6r5c-r473) in file-type \u2014 strtok3\u0027s `AbstractTokenizer.ignore()` accepts negative values without validation.\n\n## Affected Methods\n- `parseFile()` \u2014 HANGS (FileTokenizer inherits vulnerable ignore())\n- `parseBuffer()` \u2014 HANGS (BufferTokenizer inherits vulnerable ignore())\n- `parseStream()` \u2014 NOT affected (ReadStreamTokenizer has own ignore() that throws RangeError)\n\n## Impact\nA 100-byte crafted .asf file permanently hangs any application using parseFile() or parseBuffer(). music-metadata has 2.2M weekly npm downloads.\n\n## Suggested Fix\nValidate `objectSize \u003e= minimumHeaderSize` before calculating the payload. Or fix strtok3\u0027s `AbstractTokenizer.ignore()` to reject negative values.",
  "id": "GHSA-v6c2-xwv6-8xf7",
  "modified": "2026-03-19T21:00:51Z",
  "published": "2026-03-17T20:04:48Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/Borewit/music-metadata/security/advisories/GHSA-v6c2-xwv6-8xf7"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-32256"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/Borewit/music-metadata"
    },
    {
      "type": "WEB",
      "url": "https://github.com/Borewit/music-metadata/releases/tag/v11.12.3"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "music-metadata has an infinite loop vulnerability in ASF parser"
}


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