music-metadata: EBML parser trusts element lengths, allowing memory exhaustion or process abort

{
  "id": "57835249850cc91e9e9492dce1e850b2873afdad3a258f267d1f387bbdf47715",
  "url": "https://osv.dev/vulnerability/GHSA-5gfj-9q3v-qfp3",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "music-metadata: EBML parser trusts element lengths, allowing memory exhaustion or process abort",
    "summary": "## Summary The Matroska/WebM EBML parser decodes attacker-controlled variable-length integer (VINT) element lengths without first validating that the declared element fits within its enclosing container or the available input. Leaf lengths are then used directly for string-token and `Uint8Array` allocations. A very small crafted `.webm`, `.mkv`, or `.mka` file can therefore cause a disproportionately large allocation, an out-of-memory denial of service, or—in one demonstrated `parseFile` case—an uncatchable V8 fatal abort. ## Impact Applications that parse untrusted Matroska/WebM media can be denied service. Depending on the input, parser API, and Node.js/V8 version, the demonstrated outcomes include: - a 34-byte input causing an approximately 128 MiB allocation before end-of-input; - a 70-byte input causing a 500 MiB allocation through a binary EBML leaf, with concurrent parses multiplying memory consumption; - a 48-byte file causing an uncatchable V8 fatal abort through `parseFile` when a leaf declares a length of 32 GiB. The fatal-abort case was reproduced on `music-metadata` 11.15.0 with Node.js 26.7.0. It was deterministic across three runs and exited with code 133 despite a surrounding `try`/`catch`. The same reporter did not reproduce that fatal abort through `parseBuffer` on Node.js 20 through 25; those configurations can still encounter allocation attempts or catchable errors. The exact failure mode is therefore runtime- and tokenizer-dependent, but the underlying va",
    "evidence": "osv:GHSA-5gfj-9q3v-qfp3",
    "products": [
      {
        "name": {
          "value": "music-metadata",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "11.16.0",
            "evidence": "/affected/0/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "medium",
    "structured": {
      "id": "GHSA-5gfj-9q3v-qfp3",
      "aliases": [
        "CVE-2026-107389",
        "GHSA-5gfj-9q3v-qfp3"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "SEMVER",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "11.16.0"
                }
              ]
            }
          ],
          "package": {
            "name": "music-metadata",
            "purl": "pkg:npm/music-metadata",
            "ecosystem": "npm"
          },
          "database_specific": {
            "source": "https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/10/GHSA-5gfj-9q3v-qfp3/GHSA-5gfj-9q3v-qfp3.json"
          }
        }
      ],
      "modified": "2026-10-08T20:00:05.878232877Z",
      "provider": "osv",
      "references": [
        "https://github.com/Borewit/music-metadata/security/advisories/GHSA-5gfj-9q3v-qfp3",
        "https://github.com/Borewit/music-metadata/pull/2735",
        "https://github.com/Borewit/music-metadata/commit/163f013364ac9fc8dd0c3987433cd065a615af58",
        "https://github.com/Borewit/music-metadata/commit/2d14dc1f7391a94235948a0b823155538f69b3df",
        "https://github.com/Borewit/music-metadata",
        "https://github.com/Borewit/music-metadata/releases/tag/v11.16.0"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-789"
        ],
        "severity": "MODERATE",
        "github_reviewed": true,
        "nvd_published_at": null,
        "github_reviewed_at": "2026-10-08T19:43:09Z"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-107389",
        "evidence": "/aliases"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 104574,
  "published_at": "2026-10-08T19:43:09+00:00"
}