CVE-2026-48937

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-06-18 · updated 2026-10-25
Weakness: CWE-400

Description

A flaw in Node.js HTTP/2 server API can cause servers to keep accepting data even after sending a `GOAWAY` frame. This vulnerability affects two supported release lines: **Node.js 22** and **Node.js 24**.

Affected products

Node.js: from 22.0 before 22.23.0; from 24.0.0 before 24.17.0 — fixed in 22.23.0, 24.17.0

How to fix

Upgrade to a fixed version: Node.js 22.23.0, 24.17.0. Check the vendor advisory for mitigations.

References

https://hackerone.com/reports/3658225
https://nodejs.org/en/blog/vulnerability/june-2026-security-releases

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