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.
References
| Link | Resource |
|---|---|
| https://gist.github.com/lyyffee/2ee1815e5c2da82c05e9838b9bfefbbc | Third Party Advisory |
| https://github.com/eslint/eslint/issues/19646 | Exploit Issue Tracking Third Party Advisory |
Configurations
History
04 Feb 2026, 15:11
| Type | Values Removed | Values Added |
|---|---|---|
| CPE | cpe:2.3:a:openjsf:eslint:*:*:*:*:*:node.js:*:* | |
| First Time |
Openjsf eslint
Openjsf |
|
| References | () https://gist.github.com/lyyffee/2ee1815e5c2da82c05e9838b9bfefbbc - Third Party Advisory | |
| References | () https://github.com/eslint/eslint/issues/19646 - Exploit, Issue Tracking, Third Party Advisory |
26 Jan 2026, 17:16
| Type | Values Removed | Values Added |
|---|---|---|
| CWE | CWE-674 | |
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 5.5 |
26 Jan 2026, 16:15
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-01-26 16:15
Updated : 2026-02-04 15:11
NVD link : CVE-2025-50537
Mitre link : CVE-2025-50537
CVE.ORG link : CVE-2025-50537
JSON object : View
Products Affected
openjsf
- eslint
CWE
CWE-674
Uncontrolled Recursion