🛡️ CVE-2025-50537 — eslint

🟡 CVSS 5.5 — Medium ⚠️ Exploit Public CWE-674 OSV
5.5
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

Withdrawn Advisory: eslint has a Stack Overflow when serializing objects with circular references

Withdrawn Advisory

This advisory has been withdrawn because RuleTester is used for testing rules during development and results in a error rather than crashing the application.

Original Description

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.

How this vulnerability can be exploited

This issue can be reached with local access to the system, attack complexity is low, an attacker needs no privileges on the target. A user must be tricked into taking some action. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality none, integrity none, availability high.

Affected software

CVE-2025-50537 is recorded against 1 package.

  • eslint

Timeline and source

Published on 26 January 2026 and last revised on 17 June 2026. A public exploit is known to exist, which raises the urgency of patching considerably. Record sourced from OSV.

References

nvd.nist.gov (Advisory)
github.com (Web)
github.com (Web)
gist.github.com (Web)
github.com (Package)

CVE-2025-50537 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Details

Severity MEDIUM
CVSS Score 5.5
CVSS Vector CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
CWE CWE-674
Public Exploit ⚠️ Yes
Source OSV
Published 2026-01-26
Updated 2026-08-12
Modified 2026-06-17
Fix URL N/A

Affected Packages

Software From version Fixed in
eslint — —

Exploit Protection

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