Reversible One-Way Hash Affecting nodejs20-debugsource package, versions <1:20.20.2-1.amzn2023.0.1


Severity

Recommended
high

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.03% (8th percentile)

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  • Snyk IDSNYK-AMZN2023-NODEJS20DEBUGSOURCE-16067657
  • published15 Apr 2026
  • disclosed30 Mar 2026

Introduced: 30 Mar 2026

NewCVE-2026-21717  (opens in a new tab)
CWE-328  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2023 nodejs20-debugsource to version 1:20.20.2-1.amzn2023.0.1 or higher.
This issue was patched in ALAS2023-2026-1577.

NVD Description

Note: Versions mentioned in the description apply only to the upstream nodejs20-debugsource package and not the nodejs20-debugsource package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2023 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