How severe is CVE-2025-59466?

CVE-2025-59466 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2025-59466 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (46th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2025-59466?

CVE-2025-59466 affects Nodejs Node.js. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2025-59466?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2025-59466 have an EU (EUVD) identifier?

Yes. CVE-2025-59466 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-3339.

When was CVE-2025-59466 published?

CVE-2025-59466 was published on 2026-01-20 and last updated on 2026-06-17.

CVE-2025-59466

CVE-2025-59466 is a high-severity vulnerability in Nodejs Node.js with a CVSS 3.x base score of 7.5. 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-248.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 1% (46th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-3339
Weakness: CWE-248
Affected product: Nodejs Node.js
Published: 2026-01-20
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2025-59466?: 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.
How severe is CVE-2025-59466?: CVE-2025-59466 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2025-59466 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (46th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2025-59466?: CVE-2025-59466 affects Nodejs Node.js. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2025-59466?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2025-59466 have an EU (EUVD) identifier?: Yes. CVE-2025-59466 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-3339.
When was CVE-2025-59466 published?: CVE-2025-59466 was published on 2026-01-20 and last updated on 2026-06-17.

References

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

Affected products (1)

cpe:2.3:a:nodejs:node.js:*:*:*:*:-:*:*:*

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