CVE-2026-33245
React Router vulnerable to XSS in unstable RSC redirect handling via javascript: redirect targets
8.0
HIGH
CVSS 3.1
EPSS 0.03%
Description
When using React Router v7's unstable RSC APIs, there exists a potential client-side XSS issue in the RSC redirect handling if redirects are coming from untrusted sources > [!NOTE] > This only impacts your application if you are using the unstable RSC APIs in React Router.
How to fix CVE-2026-33245
To remediate CVE-2026-33245, upgrade the affected package to a fixed version below.
- —upgrade to 7.13.2 or later
Is CVE-2026-33245 being exploited?
Low — EPSS is 0.0%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- >= 7.7.0, < 7.13.2
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH8.0 | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N |