CVE-2026-34077
React Router vulnerable to Denial of Service via reflected user input in single-fetch
CVSS Score
7.5
EPSS Score
0.0%
EPSS Percentile
0th
React Router is a router for React. In versions 7.7.0 through 7.13.1, when using React Router's unstable React Server Components (RSC) APIs, there is a potential client-side Cross-Site Scripting (XSS) vulnerability in the RSC redirect handling if redirects come from untrusted sources. This does not impact applications that are not using the unstable RSC APIs in React Router. This is patched in version 7.13.2.
| CWE | CWE-770 |
| Vendor | remix-run |
| Product | react-router |
| Published | Jun 2, 2026 |
| Last Updated | Jun 3, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Affected Versions
remix-run / react-router
>= 7.0.0, < 7.14.0
remix-run / turbo-stream
< 3.0.0