CVE-2026-42342
Published:June 02, 2026
Updated:June 05, 2026
React Router is a router for React. In versions 7.0.0 through 7.14.x of react-router and versions 2.10.0 through 2.17.4 of @remix-run/server-runtime, certain crafted requests can consume disproportionate server resources via unbounded path expansion in the __manifest endpoint, resulting in response time degradation and/or service unavailability for end users. This affects React Router Framework Mode applications as well as Remix applications. This does not impact applications using Declarative Mode ("<BrowserRouter>") or Data Mode ("createBrowserRouter/<RouterProvider>"). This is patched in react-router version 7.15.0 and @remix-run/server-runtime version 2.17.5.
Affected Packages
react-router (CDN_JS):
Affected version(s) >=7.0.0 <7.15.0Fix Suggestion:
Update to version 7.15.0https://github.com/remix-run/react-router.git (GITHUB):
Affected version(s) >=react-router@7.0.0 <react-router@7.15.0Fix Suggestion:
Update to version react-router@7.15.0@remix-run/server-runtime (NPM):
Affected version(s) >=2.10.0 <2.17.5Fix Suggestion:
Update to version 2.17.5react-router (NPM):
Affected version(s) >=7.0.0 <7.15.0Fix Suggestion:
Update to version 7.15.0Related Resources (3)
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)
Uncontrolled Resource Consumption
EPSS
Base Score:
0.05