MEDIUM

CVE-2026-53667

CVSS v3

6.9

MEDIUM

EPSS Score

0.4 %

exploit probability, as of 2026-10-19

CISA KEV

known exploited

Exploitation

—

SSVC status

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Affected and fixed versions

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

react-routernpmfrom 7.11.0 · fixed in 7.18.0

Vendor advisories

CVE-2026-53667 Red Hat Product Security23 known affected
react-router: React Router: Untrusted redirects due to missing protocol validation
exploit-intelligence-tech-preview/agent-client-rhel9 as a component of Exploit Intelligence · network-observability/network-observability-console-plugin-rhel9 as a component of Network Observability Operator · openshift-lightspeed/lightspeed-agentic-console-rhel9 as a component of OpenShift Lightspeed

Full record on 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.

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:L/A:N
Published: 2026-07-27
Last Modified: 2026-07-28

Frequently asked questions

What is CVE-2026-53667?

Is CVE-2026-53667 actively exploited?

Active exploitation of CVE-2026-53667 has not been confirmed. Its EPSS score was 0.4% on 2026-10-19, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-53667?

CVE-2026-53667 has a CVSS v3 base score of 6.9 (MEDIUM severity), with vector string CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:L/A:N.

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