CVE-2026-40181
CVE-2026-40181 · React Router's same-origin redirect with path starting // causes open redirect via protocol-relative URL reinterpretation
This page contains facts from public vulnerability sources. Check the original advisory before updating.
React Router is a router for React. In versions 7.0.0 through 7.14.0 and 6.7.0 through 6.30.3, certain URLs passed to the redirect function can trigger an open redirect to an external domain due to path values starting with // being reinterpreted as protocol-relative URLs. The level of impact depends on the validation done by the application prior to returning the redirect. This does not impact applications using Declarative Mode (<BrowserRouter>). This is patched in versions 7.14.1 and 6.30.4.
CVSS 6.6 · Medium · EPSS 0.2% · Fix available
- Published
- Updated
Stack: node
Affected products and versions
react-router
- Versions
- >= 7.0.0, < 7.14.1: Affected
- >= 6.7.0, < 6.30.4: Affected
No fix published
@remix-run/router
- Versions
- >= 1.3.0, < 1.23.3: Affected
No fix published
react-router npm
- Affected ranges
- SEMVER: ≥ 7.0.0, < 7.14.1
Update to 7.14.1
react-router npm
- Affected ranges
- SEMVER: ≥ 6.7.0, < 6.30.4
Update to 6.30.4
@remix-run/router npm
- Affected ranges
- SEMVER: ≥ 1.3.0, < 1.23.3
Update to 1.23.3