How severe is CVE-2025-50537?

CVE-2025-50537 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2025-50537 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (6th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-50537?

CVE-2025-50537 affects Openjsf Eslint. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-50537?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2025-50537 have an EU (EUVD) identifier?

Yes. CVE-2025-50537 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-206359.

When was CVE-2025-50537 published?

CVE-2025-50537 was published on 2026-01-26 and last updated on 2026-06-17.

CVE-2025-50537

CVE-2025-50537 is a medium-severity vulnerability in Openjsf Eslint with a CVSS 3.x base score of 5.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-674.

Key facts

Severity: Medium (CVSS 3.x base score 5.5)
EPSS exploit prediction: 0% (6th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2025-206359
Weakness: CWE-674
Affected product: Openjsf Eslint
Published: 2026-01-26
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2025-50537?: 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 severe is CVE-2025-50537?: CVE-2025-50537 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2025-50537 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (6th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-50537?: CVE-2025-50537 affects Openjsf Eslint. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-50537?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2025-50537 have an EU (EUVD) identifier?: Yes. CVE-2025-50537 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-206359.
When was CVE-2025-50537 published?: CVE-2025-50537 was published on 2026-01-26 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:openjsf:eslint:*:*:*:*:*:node.js:*:*

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