5.9

CVE-2026-21717

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**.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Nodejs ≫ Node.Js SwEdition - Version <= 20.20.1
Nodejs ≫ Node.Js SwEdition - Version >= 22.0.0 <= 22.22.1
Nodejs ≫ Node.Js SwEdition - Version >= 24.0.0 <= 24.14.0
Nodejs ≫ Node.Js SwEdition - Version >= 25.0.0 <= 25.8.1
Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.27% 0.191
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
NIST 5.9 2.2 3.6
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
HackerOne 5.9 2.2 3.6
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE-328 Use of Weak Hash

The product uses an algorithm that produces a digest (output value) that does not meet security expectations for a hash function that allows an adversary to reasonably determine the original input (preimage attack), find another input that can produce the same hash (2nd preimage attack), or find multiple inputs that evaluate to the same hash (birthday attack).

https://nodejs.org/en/blog/vulnerability/march-2026-security-releases
Vendor Advisory