GHSA-P5WG-G6QR-C7CG

Vulnerability from github – Published: 2026-01-26 18:31 – Updated: 2026-01-29 14:58
VLAI?
Summary
eslint has a Stack Overflow when serializing objects with circular references
Details

There is a Stack Overflow vulnerability in eslint before 9.26.0 when serializing objects with circular references in eslint/lib/shared/serialization.js. The exploit is triggered via the RuleTester.run() method, which validates test cases and checks for duplicates. During validation, the internal function checkDuplicateTestCase() is called, which in turn uses the isSerializable() function for serialization checks. When a circular reference object is passed in, isSerializable() enters infinite recursion, ultimately causing a Stack Overflow.

Severity ?
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
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{
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "eslint"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "9.26.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2025-50537"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-674"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-01-29T14:58:17Z",
    "nvd_published_at": "2026-01-26T16:15:58Z",
    "severity": "MODERATE"
  },
  "details": "There is a Stack Overflow vulnerability in eslint before 9.26.0 when serializing objects with circular references in `eslint/lib/shared/serialization.js`. The exploit is triggered via the `RuleTester.run()` method, which validates test cases and checks for duplicates. During validation, the internal function `checkDuplicateTestCase()` is called, which in turn uses the `isSerializable()` function for serialization checks. When a circular reference object is passed in, `isSerializable()` enters infinite recursion, ultimately causing a Stack Overflow.",
  "id": "GHSA-p5wg-g6qr-c7cg",
  "modified": "2026-01-29T14:58:17Z",
  "published": "2026-01-26T18:31:29Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-50537"
    },
    {
      "type": "WEB",
      "url": "https://github.com/eslint/eslint/issues/19646"
    },
    {
      "type": "WEB",
      "url": "https://github.com/eslint/eslint/commit/d683aebc8e0792e4f80bd1488c705c90f22c317e"
    },
    {
      "type": "WEB",
      "url": "https://gist.github.com/lyyffee/2ee1815e5c2da82c05e9838b9bfefbbc"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/eslint/eslint"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "eslint has a Stack Overflow when serializing objects with circular references"
}


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Detection rules are retrieved from Rulezet.