What is CVE-2026-22029?

CVE-2026-22029 is a high-severity vulnerability in Remix-run React-router, classified under Cross-site Scripting. CVSS score: 8.0/10. Published 2026-01-10.

How severe is CVE-2026-22029?

High severity. CVSS v3 base score is 8.0 out of 10.

XSS in Remix-run React-router

CVE-2026-22029

React Router is a router for React. In @remix-run/router version prior to 1.23.2 and react-router 7.0.0 through 7.11.0, React Router (and Remix v1/v2) SPA open navigation redirects originating from loaders or actions in Framework Mode, Dat…

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.000 (5.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.0 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:N.

Affected products

Remix-run React-router — versions react-router >= 7.0.0, < 7.12.0, >= 7.0.0, < 7.12.0, @remix-run/router < 1.23.2
Remix-run @Remix-run/router — versions < 1.23.2
Shopify React-router
Shopify Remix-run\/react

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

security-advisories@github.com (x_refsource_CONFIRM, Vendor Advisory)

Frequently asked questions

What is CVE-2026-22029?: CVE-2026-22029 is a high-severity vulnerability in Remix-run React-router, classified under Cross-site Scripting. CVSS score: 8.0/10. Published 2026-01-10.
How severe is CVE-2026-22029?: High severity. CVSS v3 base score is 8.0 out of 10.