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High

React Router: RSC Mode CSRF Bypass Allows Action Execution Before 400 Response

  • Disclosed: 24.07.2026
  • Updated: 11.10.2026 10:22

This is a follow up to CVE-2026-22030 to address related CSRF flows in unstable RSC code paths.

[!NOTE] This only affects your application if you are using the unstable RSC APIs

Affected software

Click a technology to see all vulnerabilities affecting it.

PlatformPackageVulnerable versionsFixed in
npm package react-router >= 7.12.0, < 7.18.2, >= 8.0.0, < 8.3.0 7.18.2, 8.3.0

References

CVSS score -
CVSS vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
Weakness (CWE)
CWE-352
Platform
npm
Package
react-router
Disclosed
24.07.2026
Updated
11.10.2026 10:22

Sources and licenses

OSV / GitHub Advisory Database - GHSA-qwww-vcr4-c8h2 - 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 this entry
    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
    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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