GHSA-q4gf-8mx6-v5v3Published

Next.js has a Denial of Service with Server Components

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osv · GHSA-q4gf-8mx6-v5v3

Published

A vulnerability affects certain React Server Components packages for versions 19.x and frameworks that use the affected packages, including Next.js 13.x, 14.x, 15.x, and 16.x using the App Router. The issue is tracked upstream as [CVE-2026-23869](https://github.com/facebook/react/security/advisories/GHSA-479c-33wc-g2pg). You can read more about this advisory our [this changelog](https://vercel.com/changelog/summary-of-cve-2026-23869). A specially crafted HTTP request can be sent to any App Router Server Function endpoint that, when deserialized, may trigger excessive CPU usage. This can result in denial of service in unpatched environments.

Source published: 10 Apr 2026 15:35:47 UTC
Source modified: 10 Sep 2026 03:51:02 UTC
Saved here: 24 Oct 2026 13:17:17 UTC
Source terms: GitHub Advisory Database · CC-BY-4.0

Original source record · Cite this exact observation · Complete original publisher JSON

Source: osv · GitHub Advisory Database · CC-BY-4.0. The publisher's wording is preserved. ChangeIntel groups the information and labels changes. The JSON record includes additional source fields.

CVSS_V3 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Publisher rating · HIGH