CVE-2025-50537

Exp

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.

Published: 2026-01-26 Last update: 2026-02-04 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2025-50537 is rated Exploit Available (50/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.01%). 1 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2025-50537

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2025-50537

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-01-27 — 0.01% —

Full EPSS history (1 record total)

Common vulnerability scoring system (CVSS) metrics for CVE-2025-50537

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.5 3.1 MEDIUM
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 1.8 3.6 134c704f-9b21-4f2e-91b3-4a467353bcc0

Weakness enumeration for CVE-2025-50537

GitHub Security Advisory for CVE-2025-50537

GHSA-p5wg-g6qr-c7cg · Severity: medium · Ecosystem: npm — Withdrawn Advisory: eslint has a Stack Overflow when serializing objects with circular references

OS Trackers for CVE-2025-50537

vendor priority summary link
redhat medium — https://access.redhat.com/security/cve/CVE-2025-50537
ubuntu medium CVE-2025-50537 medium priority: Ubuntu including 1 source packages (eslint), 5 status rows across 5 suites (focal, jammy, noble, questing, upstream): needs-triage 5. https://ubuntu.com/security/CVE-2025-50537

Affected software / configurations for CVE-2025-50537

Vendor Product Version Raw CPE
openjsf eslint < 9.26.0 cpe:2.3:a:openjsf:eslint:*:*:*:*:*:node.js:*:*

References for CVE-2025-50537

URL Tags
https://gist.github.com/lyyffee/2ee1815e5c2da82c05e9838b9bfefbbc Third Party Advisory
https://github.com/eslint/eslint/issues/19646 Exploit Issue Tracking Third Party Advisory
cvelogic Threat Intelligence