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URL Redirection to Untrusted Site ('Open Redirect')

CVE-2026-40181

Medium
6.6/10

Summary

React Router is a router for React. In versions from 6.7.0 through 6.30.3 and 7.0.0 through 7.14.0, 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.

  • LOW
  • NETWORK
  • LOW
  • CHANGED
  • REQUIRED
  • NONE
  • LOW
  • NONE

CWE-601 - Open Redirect

An open redirect attack employs a URL parameter, HTML refresh tags, or a DOM based location change to exploit the trust of a vulnerable domain to direct the users to a malicious website. The attack could lead to higher severity vulnerabilities such as unauthorized access control, account takeover, XSS, and more.

References

Advisory Timeline

  • Published