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High

React Router vulnerable to XSS via Open Redirects

  • Disclosed: 08.01.2026
  • Updated: 11.10.2026 10:22

React Router (and Remix v1/v2) SPA open navigation redirects originating from loaders or actions in Framework Mode, Data Mode, or the unstable RSC modes can result in unsafe URLs causing unintended javascript execution on the client. This is only an issue if developers are creating redirect paths from untrusted content or via an open redirect.

[!NOTE] This does not impact applications that use Declarative Mode (<BrowserRouter>).

Affected software

Click a technology to see all vulnerabilities affecting it.

PlatformPackageVulnerable versionsFixed in
npm package react-router >= 7.0.0, < 7.12.0 7.12.0
npm package @remix-run/router < 1.23.2 1.23.2

References

CVSS score 8/10
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N
Weakness (CWE)
CWE-79
Platform
npm
Package
react-router, @remix-run/router
Disclosed
08.01.2026
Updated
11.10.2026 10:22

Sources and licenses

OSV / GitHub Advisory Database - GHSA-2w69-qvjg-hvjx - CC BY 4.0

Vulnerability history: react-router

All published vulnerabilities of this package (npm package), newest first. Shows whether this is a one-off slip or a package that needs watching.

All (20) in the archive
Total entries
20
First → latest
04.2025 07.2026
Without a fix
0
Exploited in attacks
0

Severity breakdown

  • High 11
  • Medium 8
  • Low 1

Disclosures per year

Severity:
  1. React Router: RSC Mode CSRF Bypass Allows Action Execution Before 400 Response
    High ghsa-qwww-vcr4-c8h2 >= 7.12.0, < 7.18.2, >= 8.0.0, < 8.3.0 7.18.2, 8.3.0
  2. React Router: Unauthenticated Denial of Service via Inefficient Route Matching
    High CVE-2026-55685 >= 7.0.0, < 7.18.0 7.18.0
  3. React Router vulnerable to Denial of Service via reflected user input in single-fetch
    High · 7.5 CVE-2026-34077 >= 7.0.0, < 7.14.0 7.14.0
  4. React Router vulnerable to DoS via unbounded path expansion in __manifest endpoint
    High · 7.5 CVE-2026-42342 >= 7.0.0, < 7.15.0 7.15.0
  5. React Router's vendored turbo-stream v2 allows arbitrary constructor invocation via TYPE_ERROR deserialization leading to Unauth RCE
    High · 8.1 CVE-2026-42211 >= 7.0.0, < 7.14.2 7.14.2
  6. React Router vulnerable to XSS in unstable RSC redirect handling via javascript: redirect targets
    High · 8.0 CVE-2026-33245 >= 7.7.0, < 7.13.2 7.13.2
  7. React Router vulnerable to XSS via Open Redirects this entry
    High · 8.0 CVE-2026-22029 >= 7.0.0, < 7.12.0 7.12.0
  8. React Router SSR XSS in ScrollRestoration
    High · 8.2 CVE-2026-21884 >= 7.0.0, < 7.12.0 7.12.0
  9. React Router has XSS Vulnerability
    High · 7.6 CVE-2025-59057 >= 7.0.0, < 7.9.0 7.9.0
  10. React Router allows pre-render data spoofing on React-Router framework mode
    High · 8.2 CVE-2025-43865 >= 7.0.0-pre.0, < 7.5.2 7.5.2
  11. React Router allows a DoS via cache poisoning by forcing SPA mode
    High · 7.5 CVE-2025-43864 >= 7.2.0, < 7.5.2 7.5.2

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