7.5 HighCWE-770
CVE-2026-34077
React Router vulnerable to Denial of Service via reflected user input in single-fetch
remix-runreact-router
Status
- Not in CISA KEV
Exploit probabilityEPSSchecked 25 Oct
0.5%probability of exploitation in the next 30 days
Higher than 38% of scored CVEs
SeverityCVSS
7.5High
Description NVD
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.
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