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CVE PROGRAM SOURCE RECORD6.6 Medium

CVE-2026-40181

React Router's same-origin redirect with path starting // causes open redirect via protocol-relative URL reinterpretation

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Status
Published
Published
Updated
Assigning organization
GitHub_M

Description

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

remix-run react-router

  • >= 7.0.0, < 7.14.1affected
  • >= 6.7.0, < 6.30.4affected

remix-run @remix-run/router

  • >= 1.3.0, < 1.23.3affected

References