React Router's same-origin redirect with path starting // causes open redirect via protocol-relative URL reinterpretation
Certain URLs passed to the redirect function can trigger an open redirect to an external domain depending on the level of validation done by the application prior to returning the redirect.
[!NOTE] This does not impact your React Router application if you are using Declarative Mode (
<BrowserRouter>)
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| npm package | react-router | >= 7.0.0, < 7.14.1, >= 6.7.0, < 6.30.4 | 7.14.1, 6.30.4 |
| npm package | @remix-run/router | >= 1.3.0, < 1.23.3 | 1.23.3 |
References
- CVSS vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:U- Weakness (CWE)
CWE-601- Platform
- npm
- Package
react-router, @remix-run/router- Disclosed
- 03.06.2026
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-2j2x-hqr9-3h42 - CC BY 4.0
Vulnerability history: @remix-run/router
All published vulnerabilities of this package (npm package), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 2
- First → latest
- 01.2026 06.2026
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- High 1
- Medium 1
Disclosures per year
- 2026: 2
-
React Router's same-origin redirect with path starting // causes open redirect via protocol-relative URL reinterpretation this entry
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