CVE-2025-50537
Eslint Stack Overflow Vulnerability
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.
INFO
Published Date :
Jan. 26, 2026, 4:15 p.m.
Last Modified :
Feb. 4, 2026, 3:11 p.m.
Remotely Exploit :
No
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | 134c704f-9b21-4f2e-91b3-4a467353bcc0 |
Solution
- Update eslint to version 9.26.0 or later.
- Ensure RuleTester is not exposed to untrusted input.
- Sanitize all inputs to RuleTester validation functions.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2025-50537.
| URL | Resource |
|---|---|
| https://gist.github.com/lyyffee/2ee1815e5c2da82c05e9838b9bfefbbc | Third Party Advisory |
| https://github.com/eslint/eslint/issues/19646 | Exploit Issue Tracking Third Party Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2025-50537 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2025-50537
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2025-50537 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2025-50537 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Feb. 04, 2026
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:a:openjsf:eslint:*:*:*:*:*:node.js:*:* versions up to (excluding) 9.26.0 Added Reference Type MITRE: https://gist.github.com/lyyffee/2ee1815e5c2da82c05e9838b9bfefbbc Types: Third Party Advisory Added Reference Type MITRE: https://github.com/eslint/eslint/issues/19646 Types: Exploit, Issue Tracking, Third Party Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jan. 26, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H Added CWE CWE-674 -
New CVE Received by [email protected]
Jan. 26, 2026
Action Type Old Value New Value Added 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. Added Reference https://gist.github.com/lyyffee/2ee1815e5c2da82c05e9838b9bfefbbc Added Reference https://github.com/eslint/eslint/issues/19646