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CVE-2025-59057: React Router has XSS Vulnerability

• Severity: high (CVSS 7.6 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-01-10 · updated 2026-07-15
• Weakness: CWE-79

Description

React Router is a router for React. In @remix-run/react versions 1.15.0 through 2.17.0. and react-router versions 7.0.0 through 7.8.2, a XSS vulnerability exists in in React Router's meta()/<Meta> APIs in Framework Mode when generating script:ld+json tags which could allow arbitrary JavaScript execution during SSR if untrusted content is used to generate the tag. There is no impact if the application is being used in Declarative Mode (<BrowserRouter>) or Data Mode (createBrowserRouter/<RouterProvider>). This issue has been patched in @remix-run/react version 2.17.1 and react-router version 7.9.0.

Affected products

• remix-run react-router: from 7.0.0 through 7.8.2
• Shopify Remix-Run/React: from 1.15.0 through 2.17.0

References

• https://github.com/remix-run/react-router/security/advisories/GHSA-3cgp-3xvw-98x8
• https://access.redhat.com/errata/RHSA-2026:19712
• https://access.redhat.com/errata/RHSA-2026:3782
• https://access.redhat.com/errata/RHSA-2026:3958
• https://access.redhat.com/errata/RHSA-2026:3960
• https://access.redhat.com/security/cve/CVE-2025-59057
• https://bugzilla.redhat.com/show_bug.cgi?id=2428426
• https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-59057.json

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