CVE-2026-33244

Name: CVE-2026-33244
Creator: NVD / NIST
Published: 2026-06-02T17:16:28.03+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.4/10EPSS 0.14%

Last modified Jun 17, 2026

CVE-2026-33244 is a medium-severity vulnerability rated 5.4/10 on the CVSS scale. 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. EPSS estimates a 0.14% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

5.4/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

EPSS Probability

0.14%

4.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Shopify	React-Router	>= 7.5.1, < 7.13.2

References

https://github.com/remix-run/react-router/security/advisories/GHSA-f22v-gfqf-p8f3Vendor Advisory

Timeline

Published: Jun 2, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-33244?

How severe is CVE-2026-33244?

CVE-2026-33244 has a CVSS score of 5.4/10 (MEDIUM severity). The EPSS model estimates a 0.14% probability of exploitation in the next 30 days.

How do I fix CVE-2026-33244?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-33244?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST