GHSA-wx67-qw84-cm4g
HIGHGHSA-wx67-qw84-cm4g is a high-severity (CVSS 7.5) vulnerability in react-server-dom-webpack. O3 Security confirms whether GHSA-wx67-qw84-cm4g is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.
react-server-dom: Denial of Service in Server Functions
Real-World Exposure
How broadly this vulnerability is actually deployed: weekly install volume shows current usage, a proxy for how much of the ecosystem is exposed.
react-server-dom-webpacknpmreact-server-dom-turbopacknpmDescription
Impact
A denial of service vulnerability could be triggered by sending specially crafted HTTP requests to server function endpoints, this could lead to out-of-memory exceptions or excessive CPU usage.
We recommend updating immediately.
The vulnerability exists in versions 19.0.0 through 19.0.7, 19.1.0 through 19.1.8, and 19.2.0 through 19.2.7 of:
- react-server-dom-webpack
- react-server-dom-parcel
- react-server-dom-turbopack
Patches
Fixes were back ported to versions 19.0.8, 19.1.9, and 19.2.8.
If you are using any of the above packages please upgrade to any of the fixed versions immediately.
If your app’s React code does not use a server, your app is not affected by this vulnerability. If your app does not use a framework, bundler, or bundler plugin that supports React Server Components, your app is not affected by this vulnerability.
Affected Packages
| Ecosystem | Package | Vulnerable range | Fix |
|---|---|---|---|
| 📦npm | react-server-dom-webpack | ≥ 19.0.0&&< 19.0.8 | 19.0.8 |
| 📦npm | react-server-dom-turbopack | ≥ 19.0.0&&< 19.0.8 | 19.0.8 |
| 📦npm | react-server-dom-turbopack | ≥ 19.1.0&&< 19.1.9 | 19.1.9 |
| 📦npm | react-server-dom-parcel | ≥ 19.1.0&&< 19.1.9 | 19.1.9 |
| 📦npm | react-server-dom-webpack | ≥ 19.1.0&&< 19.1.9 | 19.1.9 |
| 📦npm | react-server-dom-turbopack | ≥ 19.2.0&&< 19.2.8 | 19.2.8 |
Detection & mitigation playbook
Open-source dependencyDetect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for react-server-dom-webpack. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.
Fix
Update react-server-dom-webpack to 19.0.8 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-wx67-qw84-cm4g is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
How O3 protects you
O3 pinpoints whether GHSA-wx67-qw84-cm4g is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.
Tailored to GHSA-wx67-qw84-cm4g. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.
Frequently Asked Questions
Is GHSA-wx67-qw84-cm4g in your dependencies?
O3 detects GHSA-wx67-qw84-cm4g across npm dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.