CVE-2025-59466

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.7% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-01-20 · updated 2026-06-17
Weakness: CWE-248

Description

We have identified a bug in Node.js error handling where "Maximum call stack size exceeded" errors become uncatchable when `async_hooks.createHook()` is enabled. Instead of reaching `process.on('uncaughtException')`, the process terminates, making the crash unrecoverable. Applications that rely on `AsyncLocalStorage` (v22, v20) or `async_hooks.createHook()` (v24, v22, v20) become vulnerable to denial-of-service crashes triggered by deep recursion under specific conditions.

Affected products

Node.js: from 20.0.0 before 20.20.0; from 22.0.0 before 22.22.0; from 24.0.0 before 24.13.0; from 25.0.0 before 25.3.0 — fixed in 20.20.0, 22.22.0, 24.13.0, 25.3.0

How to fix

Upgrade to a fixed version: Node.js 20.20.0, 22.22.0, 24.13.0, 25.3.0. Check the vendor advisory for mitigations.

References

https://nodejs.org/en/blog/vulnerability/december-2025-security-releases

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