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CVE Vulnerability Details :
CVE-2026-55685
PUBLISHED
More InfoOfficial Page
Assigner-GitHub_M
Assigner Org ID-a0819718-46f1-4df5-94e2-005712e83aaa
View Known Exploited Vulnerability (KEV) details
Published At-27 Jul, 2026 | 21:45
Updated At-27 Jul, 2026 | 21:45
Rejected At-
▼CVE Numbering Authority (CNA)
React Router: Unauthenticated Denial of Service via Inefficient Route Matching

React Router is a router for React. In versions 7.0.0 through 7.17.0, the manifest endpoint could be accessed via unauthenticated targeted requests that would put heavy load on the server and slow down response times. This issue is a follow up to CVE-2026-42342, and does not does not impact React Router applications using Declarative Mode (<BrowserRouter>) or Data Mode (createBrowserRouter/<RouterProvider>). This issue has been fixed in version 7.18.0.

Affected Products
Vendor
remix-run
Product
react-router
Versions
Affected
  • >= 7.0.0, < 7.18.0
Problem Types
TypeCWE IDDescription
CWECWE-400CWE-400: Uncontrolled Resource Consumption
CWECWE-407CWE-407: Inefficient Algorithmic Complexity
Type: CWE
CWE ID: CWE-400
Description: CWE-400: Uncontrolled Resource Consumption
Type: CWE
CWE ID: CWE-407
Description: CWE-407: Inefficient Algorithmic Complexity
Metrics
VersionBase scoreBase severityVector
4.08.7HIGH
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Version: 4.0
Base score: 8.7
Base severity: HIGH
Vector:
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://github.com/remix-run/react-router/security/advisories/GHSA-chx6-hx7r-mcp5
x_refsource_CONFIRM
https://github.com/remix-run/react-router/security/advisories/GHSA-8x6r-g9mw-2r78
x_refsource_MISC
https://github.com/remix-run/react-router/pull/15186
x_refsource_MISC
https://github.com/remix-run/react-router/commit/09e6020d1950e54f361f7ad00938ecd4dde60929
x_refsource_MISC
https://github.com/remix-run/react-router/blob/main/CHANGELOG.md#v7180
x_refsource_MISC
https://github.com/remix-run/react-router/releases/tag/react-router@7.18.0
x_refsource_MISC
Hyperlink: https://github.com/remix-run/react-router/security/advisories/GHSA-chx6-hx7r-mcp5
Resource:
x_refsource_CONFIRM
Hyperlink: https://github.com/remix-run/react-router/security/advisories/GHSA-8x6r-g9mw-2r78
Resource:
x_refsource_MISC
Hyperlink: https://github.com/remix-run/react-router/pull/15186
Resource:
x_refsource_MISC
Hyperlink: https://github.com/remix-run/react-router/commit/09e6020d1950e54f361f7ad00938ecd4dde60929
Resource:
x_refsource_MISC
Hyperlink: https://github.com/remix-run/react-router/blob/main/CHANGELOG.md#v7180
Resource:
x_refsource_MISC
Hyperlink: https://github.com/remix-run/react-router/releases/tag/react-router@7.18.0
Resource:
x_refsource_MISC
Details not found