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.
History

Wed, 03 Jun 2026 18:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Wed, 03 Jun 2026 05:00:00 +0000

Type Values Removed Values Added
First Time appeared Remix-run
Remix-run react-router
Vendors & Products Remix-run
Remix-run react-router

Wed, 03 Jun 2026 02:30:00 +0000

Type Values Removed Values Added
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.
Title React Router's same-origin redirect with path starting // causes open redirect via protocol-relative URL reinterpretation
Weaknesses CWE-601
References
Metrics cvssV4_0

{'score': 6.6, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:U'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2026-06-02T17:55:09.919Z

Updated: 2026-06-03T15:56:43.041Z

Reserved: 2026-04-09T20:59:17.619Z

Link: CVE-2026-40181

cve-icon Vulnrichment

Updated: 2026-06-03T15:56:39.667Z

cve-icon NVD

Status : Received

Published: 2026-06-02T20:16:35.597

Modified: 2026-06-02T20:16:35.597

Link: CVE-2026-40181

cve-icon Redhat

No data.