Information Exposure Affecting npm package, versions <1:11.11.0-1.24.14.1.2.module+el8.10.0+24190+49a46c75


Severity

Recommended
high

Based on CentOS security rating.

Threat Intelligence

EPSS
0.03% (9th percentile)

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  • Snyk IDSNYK-CENTOS8-NPM-15893602
  • published4 Apr 2026
  • disclosed30 Mar 2026

Introduced: 30 Mar 2026

CVE-2026-21713  (opens in a new tab)
CWE-208  (opens in a new tab)

How to fix?

Upgrade Centos:8 npm to version 1:11.11.0-1.24.14.1.2.module+el8.10.0+24190+49a46c75 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream npm package and not the npm package as distributed by Centos. See How to fix? for Centos:8 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