GHSA-h25m-26qc-wcjf
Next.js HTTP request deserialization can lead to DoS when using insecure React Server Components
Quick fix
GHSA-h25m-26qc-wcjf — next: upgrade to the fixed version with the command below.
npm install next@15.0.8Details
A vulnerability affects certain React Server Components packages for versions 19.0.x, 19.1.x, and 19.2.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-2026-23864](https://github.com/facebook/react/security/advisories/GHSA-83fc-fqcc-2hmg).
A specially crafted HTTP request can be sent to any App Router Server Function endpoint that, when deserialized, may trigger excessive CPU usage, out-of-memory exceptions, or server crashes. This can result in denial of service in unpatched environments.
Are you affected?
Enter the version of the package you're using.
Affected packages
15.6.0-canary.0Fixed in: 15.6.0-canary.61npm install next@15.6.0-canary.61References
- https://github.com/facebook/react/security/advisories/GHSA-83fc-fqcc-2hmg[WEB]
- https://github.com/vercel/next.js/security/advisories/GHSA-h25m-26qc-wcjf[WEB]
- https://nvd.nist.gov/vuln/detail/CVE-2026-23864[ADVISORY]
- https://github.com/vercel/next.js[PACKAGE]
- https://vercel.com/changelog/summary-of-cve-2026-23864[WEB]