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Vulnerability record · CVE-2026-53667 · published 27 July 2026

CVE-2026-53667: Shopify react-router cross-site scripting vulnerability

Shopify · React Router

React Router is a router for React. In versions 7.11.0 through 7.17.0, the RSCErrorHandler is missing protocol validation, allowing for redirects from untrusted sources. This issue is a follow up to CVE-2026-53667, and only affects consuming applications if they are using the unstable RSC APIs. This issue has been fixed in version 7.18.0.

6.1 CVSS 3.1 Medium EPSS 0.36% · top 73.3% CWE-79 · Cross-site scripting
6.1CVSS 3.1 base score
0.36%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
5References
3 Aug 2026Last modified by NVD

Description

React Router is a router for React. In versions 7.11.0 through 7.17.0, the RSCErrorHandler is missing protocol validation, allowing for redirects from untrusted sources. This issue is a follow up to CVE-2026-53667, and only affects consuming applications if they are using the unstable RSC APIs. This issue has been fixed in version 7.18.0.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/remix-run/react-router/blob/main/CHANGELOG.md#v7180 Release Notes
https://github.com/remix-run/react-router/commit/ce596e823f0d7b883a433af1d5a839a8b9fe0242 Patch
https://github.com/remix-run/react-router/pull/15177 Issue TrackingPatch
https://github.com/remix-run/react-router/releases/tag/[email protected] Release Notes
https://github.com/remix-run/react-router/security/advisories/GHSA-h8fp-f39c-q6mh Third Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-53667), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.