PT-2026-45832 · Remix Run · React Router

Published 2026-06-02 · Updated 2026-06-02 · CVE-2026-40181

Mitre

CVSS v4.0

6.6

Medium

Base vector

AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:U

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 (). This is patched in versions 7.14.1 and 6.30.4.

Fix

Open Redirect

Weakness Enumeration

CWE-601

Related Identifiers

CVE-2026-40181

Affected Products

React Router

References · 2

• https://nvd.nist.gov/vuln/detail/CVE-2026-40181 · Security Note
• https://github.com/remix-run/react-router/security/advisories/GHSA-2j2x-hqr9-3h42 · Note