GHSA-V6C2-XWV6-8XF7
Vulnerability from github – Published: 2026-03-17 20:04 – Updated: 2026-03-19 21:00Summary
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.
{
"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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