Security Digest · Critical advisory (no CVE assigned)
GHSA-9qr9-h5gf-34mp: Next.js is vulnerable to RCE in React flight protocol
A vulnerability affects certain React packages 1 for versions 19.0.0, 19.1.0, 19.1.1, and 19.2.0 and frameworks that use the affected packages, including Next.js 15.x and 16.x using the App Router.
CVSS 10.0 Critical GitHub-reviewed · critical
Should you act?
- Only if you depend on one of the packages below, directly or transitively, in a vulnerable version. Check your lockfile with
npm audit (or: npm ls <package>). - No CVE has been assigned, so it will not appear in CVE-based scanners that ignore GitHub advisories.
npm audit,pip-auditand Dependabot do read GitHub advisories.
Affected packages
| Ecosystem | Package | Vulnerable | First fixed |
|---|---|---|---|
| npm | next | >= 14.3.0-canary.77, < 15.0.5 | 15.0.5 |
| npm | next | >= 15.2.0-canary.0, < 15.2.6 | 15.2.6 |
| npm | next | >= 15.3.0-canary.0, < 15.3.6 | 15.3.6 |
| npm | next | >= 15.4.0-canary.0, < 15.4.8 | 15.4.8 |
| npm | next | >= 16.0.0-canary.0, < 16.0.7 | 16.0.7 |
| npm | next | >= 15.1.0-canary.0, < 15.1.9 | 15.1.9 |
| npm | next | >= 15.5.0-canary.0, < 15.5.7 | 15.5.7 |
Details
A vulnerability affects certain React packages 1 for versions 19.0.0, 19.1.0, 19.1.1, and 19.2.0 and frameworks that use the affected packages, including Next.js 15.x and 16.x using the App Router. The issue is tracked upstream as CVE-2025-55182.
Fixed in: React: 19.0.1, 19.1.2, 19.2.1 Next.js: 15.0.5, 15.1.9, 15.2.6, 15.3.6, 15.4.8, 15.5.7, 16.0.7, 15.6.0-canary.58, 16.1.0-canary.12+
The vulnerability also affects experimental canary releases starting with 14.3.0-canary.77. Users on any of the 14.3 canary builds should either downgrade to a 14.x stable release or 14.3.0-canary.76.
All users of stable 15.x or 16.x Next.js versions should upgrade to a patched, stable version immediately.
1 The affected React packages are: - react-server-dom-parcel - react-server-dom-turbopack - react-server-dom-webpack
CVSS: 10.0 (v3.1) CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Sources and references
- GitHub Advisory GHSA-9qr9-h5gf-34mp github.com
- github.com github.com
- nvd.nist.gov nvd.nist.gov
- github.com github.com
- github.com github.com