CVE-2026-40181

MEDIUM

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

Title source: cna
STIX 2.1

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.

References (1)

Core 1
Core References

Scores

CVSS v3 6.1
EPSS 0.0015
EPSS Percentile 4.8%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact partial

Details

CWE
CWE-601
Status published
Products (5)
npm/react-router 6.7.0 - 6.30.4npm
npm/react-router 7.0.0 - 7.14.1npm
remix-run/react-router >= 6.7.0, < 6.30.4
remix-run/react-router >= 7.0.0, < 7.14.1
shopify/react-router 6.7.0 - 6.30.4
Published Jun 02, 2026
Tracked Since Jun 03, 2026