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CVE-2026-55685

HIGH
8.7
CVSS 4.0
Description
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.

Metadata

CVE ID
CVE-2026-55685
State
PUBLISHED
Assigner
GitHub_M
Reserved
2026-06-17 00:13 UTC
Published
2026-07-27 21:45 UTC
Last updated
2026-07-28 13:40 UTC
Primary CWE
CWE-400
CWE-400: Uncontrolled Resource Consumption
Vendor / Product
remix-run / react-router
Sources
cve.org  ·  NVD

Severity & Metrics

8.7 HIGH CVSS 4.0
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
SSVC — CISA Coordinator
Exploitation
none
Automatable
yes
Tech. Impact
partial
Affected products (1)
VendorProductPlatformVersions
remix-run react-router — >= 7.0.0, < 7.18.0
Weakness (CWE)
CWESourceDescription
CWE-400 cna CWE-400: Uncontrolled Resource Consumption
CWE-407 cna CWE-407: Inefficient Algorithmic Complexity
CVSS scores (1)
ScoreSeverityVersionSourceVector
8.7 HIGH 4.0 cna 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
References (6)
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