Denial-of-Service Vulnerability in Node.js Affects Multiple Versions
CVE-2025-59466

5.9MEDIUM

Key Information:

Vendor

Nodejs

Status
Node
Vendor
CVE Published:
20 January 2026

Badges

📰 News Worthy

What is CVE-2025-59466?

A flaw in Node.js error handling has been discovered, where enabling 'async_hooks.createHook()' leads to a scenario where 'Maximum call stack size exceeded' errors become uncatchable. This results in application crashes without reaching the 'uncaughtException' handler. As a consequence, applications that utilize 'AsyncLocalStorage' and specific versions of 'async_hooks.createHook()' are left exposed, allowing for denial-of-service attacks caused by deep recursion under particular conditions. Developers are urged to review their applications for these vulnerabilities and implement necessary safeguards.

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Affected Version(s)

node 20.19.6

node 22.21.1

node 24.12.0

News Articles

favicon imageThe Hacker News

Critical Node.js Vulnerability Can Cause Server Crashes via async_hooks Stack Overflow

Node.js released updates fixing a critical DoS flaw caused by async_hooks stack crashes, tracked as CVE-2025-59466, impacting most production apps.

3 weeks ago

References

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

CVSS V3.0

Score:
5.9
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • 📰

    First article discovered by The Hacker News

  • Vulnerability Reserved

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