CVE-2026-21717 Affecting nodejs package, versions <1:24.14.1-2.module+el8.10.0+90873+35652ecc


Severity

Recommended
high

Based on Oracle Linux security rating.

Threat Intelligence

EPSS
0.03% (8th percentile)

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  • Snyk IDSNYK-ORACLE8-NODEJS-16077165
  • published16 Apr 2026
  • disclosed30 Mar 2026

Introduced: 30 Mar 2026

NewCVE-2026-21717  (opens in a new tab)

How to fix?

Upgrade Oracle:8 nodejs to version 1:24.14.1-2.module+el8.10.0+90873+35652ecc or higher.
This issue was patched in ELSA-2026-7670.

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 V8's string hashing mechanism causes integer-like strings to be hashed to their numeric value, making hash collisions trivially predictable. By crafting a request that causes many such collisions in V8's internal string table, an attacker can significantly degrade performance of the Node.js process.

The most common trigger is any endpoint that calls JSON.parse() on attacker-controlled input, as JSON parsing automatically internalizes short strings into the affected hash table.

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

CVSS Base Scores

version 3.1