Uncaught Exception Affecting node package, versions [,20.20.0)[21.0.0,22.22.0)[23.0.0,24.13.0)[25.0.0,25.3.0)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-UPSTREAM-NODE-14982196
- published16 Jan 2026
- disclosed13 Jan 2026
- credit0xmaxhax
Introduced: 13 Jan 2026
CVE-2026-21637 (opens in a new tab)How to fix?
Upgrade node to version 20.20.0, 22.22.0, 24.13.0, 25.3.0 or higher.
Overview
node is a JavaScript runtime built on Chrome's V8 JavaScript engine.
Affected versions of this package are vulnerable to Uncaught Exception in the TLS module when a TLS server is configured with pskCallback or ALPNCallback. A remote attacker can crash or exhaust resources of a TLS server by sending input that causes the callback to throw an error.