CVE-2026-21713 Affecting nodejs22 package, versions <22.22.2-150700.3.9.1


Severity

Recommended
0.0
medium
0
10

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
0.03% (8th percentile)

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  • Snyk IDSNYK-SLES157-NODEJS22-16115469
  • published21 Apr 2026
  • disclosed20 Apr 2026

Introduced: 20 Apr 2026

NewCVE-2026-21713  (opens in a new tab)

How to fix?

Upgrade SLES:15.7 nodejs22 to version 22.22.2-150700.3.9.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream nodejs22 package and not the nodejs22 package as distributed by SLES. See How to fix? for SLES:15.7 relevant fixed versions and status.

A flaw in Node.js HMAC verification uses a non-constant-time comparison when validating user-provided signatures, potentially leaking timing information proportional to the number of matching bytes. Under certain threat models where high-resolution timing measurements are possible, this behavior could be exploited as a timing oracle to infer HMAC values.

Node.js already provides timing-safe comparison primitives used elsewhere in the codebase, indicating this is an oversight rather than an intentional design decision.

This vulnerability affects 20.x, 22.x, 24.x, and 25.x.

CVSS Base Scores

version 3.1