Open redirect in React Router - CVE-2026-53668
Published: July 22, 2026
Vulnerability identifier: #VU139177
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-53668
CWE-ID: CWE-601
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Remix
Affected software:
React Router
React Router
Detailed vulnerability description
The vulnerability allows a remote attacker to disclose sensitive information or perform cross-site scripting.
The vulnerability exists due to improper input validation in redirect handling when processing attacker-crafted links. A remote attacker can supply a specially crafted link to trigger a redirect to an unexpected external location or an XSS vector to disclose sensitive information or perform cross-site scripting.
User interaction is required to follow the crafted link.
How to mitigate CVE-2026-53668
Install security update from vendor's website.