High severity7.5NVD Advisory· Published Jun 2, 2026· Updated Jun 4, 2026
CVE-2026-34077
CVE-2026-34077
Description
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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LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
react-routernpm | >= 7.0.0, < 7.14.0 | 7.14.0 |
turbo-streamnpm | < 3.0.0 | 3.0.0 |
Affected products
5- Range: <7.13.2
- ghsa-coords2 versions
>= 7.0.0, < 7.14.0+ 1 more
- (no CPE)range: >= 7.0.0, < 7.14.0
- (no CPE)range: < 3.0.0
Patches
Vulnerability mechanics
References
6- github.com/advisories/GHSA-rxv8-25v2-qmq8ghsaADVISORY
- github.com/remix-run/react-router/security/advisories/GHSA-rxv8-25v2-qmq8nvdVendor AdvisoryWEB
- nvd.nist.gov/vuln/detail/CVE-2026-34077ghsaADVISORY
- github.com/jacob-ebey/turbo-stream/blob/v2.4.1/src/flatten.tsghsaWEB
- github.com/jacob-ebey/turbo-stream/blob/v2.4.1/src/unflatten.tsghsaWEB
- github.com/remix-run/react-router/commit/59811921d3c7d599077b8cadccdcd65a233165e0ghsaWEB
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