CVE-2026-40181

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.

PUBLISHED Reserved 2026-04-09 | Published 2026-06-02 | Updated 2026-06-03 | Assigner GitHub_M

Problem types

CWE-601: URL Redirection to Untrusted Site ('Open Redirect')

Product status

References

github.com/...router/security/advisories/GHSA-2j2x-hqr9-3h42

cve.org (CVE-2026-40181)

nvd.nist.gov (CVE-2026-40181)

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