CVE-2026-21637 Affecting nodejs package, versions <1:22.22.0-1.module+el8.10.0+90783+325ded07


Severity

Recommended
0.0
high
0
10

Based on Oracle Linux security rating.

Threat Intelligence

EPSS
0.03% (10th percentile)

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  • Snyk IDSNYK-ORACLE8-NODEJS-15265527
  • published11 Feb 2026
  • disclosed20 Jan 2026

Introduced: 20 Jan 2026

NewCVE-2026-21637  (opens in a new tab)

How to fix?

Upgrade Oracle:8 nodejs to version 1:22.22.0-1.module+el8.10.0+90783+325ded07 or higher.
This issue was patched in ELSA-2026-2421.

NVD Description

Note: Versions mentioned in the description apply only to the upstream nodejs package and not the nodejs package as distributed by Oracle. See How to fix? for Oracle:8 relevant fixed versions and status.

A flaw in Node.js TLS error handling allows remote attackers to crash or exhaust resources of a TLS server when pskCallback or ALPNCallback are in use. Synchronous exceptions thrown during these callbacks bypass standard TLS error handling paths (tlsClientError and error), causing either immediate process termination or silent file descriptor leaks that eventually lead to denial of service. Because these callbacks process attacker-controlled input during the TLS handshake, a remote client can repeatedly trigger the issue. This vulnerability affects TLS servers using PSK or ALPN callbacks across Node.js versions where these callbacks throw without being safely wrapped.

CVSS Base Scores

version 3.1