CVE-2025-50537

Description

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.

Weakness classification

• 134c704f-9b21-4f2e-91b3-4a467353bcc0: CWE-674

Primary references

• cve@mitre.org — Third Party Advisory
• cve@mitre.org — Exploit, Issue Tracking, Third Party Advisory