CVE-2026-34077
Published:June 02, 2026
Updated:June 05, 2026
React Router is a router for React. In versions 7.7.0 through 7.13.1, when using React Router's unstable React Server Components (RSC) APIs, there is a potential client-side Cross-Site Scripting (XSS) vulnerability in the RSC redirect handling if redirects come from untrusted sources. This does not impact applications that are not using the unstable RSC APIs in React Router. This is patched in version 7.13.2.
Affected Packages
react-router (CDN_JS):
Affected version(s) >=7.0.0 <7.14.0Fix Suggestion:
Update to version 7.14.0https://github.com/remix-run/react-router.git (GITHUB):
Affected version(s) >=react-router@7.0.0 <react-router@7.14.0Fix Suggestion:
Update to version react-router@7.14.0turbo-stream (NPM):
Affected version(s) >=0.0.1 <3.0.0Fix Suggestion:
Update to version 3.0.0turbo-stream (NPM):
Affected version(s) >=0.0.1 <3.0.0Fix Suggestion:
Update to version 3.0.0react-router (NPM):
Affected version(s) >=7.0.0 <7.14.0Fix Suggestion:
Update to version 7.14.0react-router (NPM):
Affected version(s) >=7.0.0 <7.14.0Fix Suggestion:
Update to version 7.14.0Related Resources (6)
Do you need more information?
Contact UsCVSS v4
Base Score:
8.7
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
NONE
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
7.5
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Weakness Type (CWE)
Allocation of Resources Without Limits or Throttling
EPSS
Base Score:
0.04