CVE-2026-33244— React Router has stored XSS via unescaped Location header in prerendered redirect HTML
Possible ATT&CK Techniques 1AI
T1059 · Command and Scripting InterpreterAffected Version Matrix 1
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| remix-run | react-router | >= 7.5.1, < 7.13.2 | affected |
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I. Basic Information for CVE-2026-33244
Vulnerability Information
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Vulnerability Title
React Router has stored XSS via unescaped Location header in prerendered redirect HTML
Source: NVD (National Vulnerability Database)
Vulnerability Description
React Router is a router for React. In versions 7.5.1 through 7.13.1, when using Framework Mode with pre-rendering enabled, improper neutralization of the HTTP `Location` header value can permit Cross-Site Scripting (XSS) in the statically generated HTML files if the redirect location comes from an untrusted source. This does not impact applications using Declarative Mode (`<BrowserRouter>`) or Data Mode (`createBrowserRouter/<RouterProvider>`). This is patched in version 7.13.2.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: NVD (National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| remix-run | react-router | >= 7.5.1, < 7.13.2 | - |
II. Public POCs for CVE-2026-33244
| # | POC Description | Source Link | Shenlong Link |
|---|
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No public POC found.
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Vendor Advisories for CVE-2026-33244 (1)
Same Patch Batch · remix-run · 2026-06-02 · 6 CVEs total
| CVE-2026-42211 | 8.1 HIGH | React Router's vendored turbo-stream v2 allows arbitrary constructor invocation via TYPE_E |
| CVE-2026-33245 | 8.0 HIGH | React Router vulnerable to XSS in unstable RSC redirect handling via javascript: redirect |
| CVE-2026-42342 | 7.5 HIGH | React Router vulnerable to DoS via unbounded path expansion in __manifest endpoint |
| CVE-2026-34077 | 7.5 HIGH | React Router vulnerable to Denial of Service via reflected user input in single-fetch |
| CVE-2026-40181 | React Router's same-origin redirect with path starting // causes open redirect via protoco |
IV. Related Vulnerabilities
Same product: react-router
- CVE-2026-42342
React Router vulnerable to DoS via unbounded path expansion - CVE-2026-42211
React Router's vendored turbo-stream v2 allows arbitrary con - CVE-2026-40181
React Router's same-origin redirect with path starting // ca - CVE-2026-34077
React Router vulnerable to Denial of Service via reflected u - CVE-2026-33245
React Router vulnerable to XSS in unstable RSC redirect hand
Same vendor: remix-run
- CVE-2026-42342
React Router vulnerable to DoS via unbounded path expansion - CVE-2026-42211
React Router's vendored turbo-stream v2 allows arbitrary con - CVE-2026-40181
React Router's same-origin redirect with path starting // ca - CVE-2026-34077
React Router vulnerable to Denial of Service via reflected u - CVE-2026-33245
React Router vulnerable to XSS in unstable RSC redirect hand
Same weakness: CWE-79
- CVE-2026-5385
GLPI 11.0.0 - Stored XSS in knowledge base - CVE-2026-33245
React Router vulnerable to XSS in unstable RSC redirect hand - CVE-2026-28116
WordPress Progress Planner plugin <= 1.9.0 - Cross Site Scri - CVE-2026-32250
NamelessMC has Reflected Cross-Site Scripting (XSS) in id pa - CVE-2026-42685
WordPress WP Job Portal plugin <= 2.5.1 - Cross Site Scripti
V. Comments for CVE-2026-33244
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