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CVE-2026-53667

6.9 · MEDIUM

React Router is a router for React.

Published Jul 27, 2026CWE-79EPSS 0.36%

Overview

CVE-2026-53667 is a medium-severity vulnerability. It was published on July 27, 2026 and has a CVSS 3.1 base score of 6.9 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 6.9, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/remix-run/react-router/blob/main/CHANGELOG.md#v7180GitHubgithub.com/remix-run/react-router/commit/ce596e823f0d7b883a433af1d5a839a8b9fe0242GitHubgithub.com/remix-run/react-router/pull/15177GitHubgithub.com/remix-run/react-router/releases/tag/[email protected]GitHubgithub.com/remix-run/react-router/security/advisories/GHSA-h8fp-f39c-q6mh

How CyberStrike helps

Frequently asked questions

What is CVE-2026-53667?

CVE-2026-53667 is a medium-severity vulnerability. It was published on July 27, 2026 and has a CVSS 3.1 base score of 6.9 (MEDIUM).

How severe is CVE-2026-53667?

This vulnerability has a CVSS 3.1 base score of 6.9, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-53667?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-53667?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-53667 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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