PT-2026-64383 · Npm · React Router

Published 2026-07-24 · Updated 2026-07-24

OSV

CVSS v4.0

8.7

High

Base vector

AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

This is a follow up to https://github.com/remix-run/react-router/security/advisories/GHSA-8x6r-g9mw-2r78 that covers additional reported scenarios in which the manifest endpoint could be accessed via unauthenticated targeted requests that would put heavy load on the server and slow down response times.

[!NOTE] This only impacts Framework Mode applications. This does not impact your application if you are using Declarative or Data Mode.

Fix

Resource Exhaustion

Weakness Enumeration

CWE-407

CWE-400

Related Identifiers

GHSA-CHX6-HX7R-MCP5

Affected Products

React Router

References · 7

• https://osv.dev/vulnerability/GHSA-chx6-hx7r-mcp5 · Vendor Advisory
• https://github.com/remix-run/react-router/releases/tag/react-router@7.18.0 · Note
• https://github.com/remix-run/react-router/blob/main/CHANGELOG.md#v7180 · Note
• https://github.com/remix-run/react-router · Note
• https://github.com/remix-run/react-router/pull/15186 · Note
• https://github.com/remix-run/react-router/security/advisories/GHSA-chx6-hx7r-mcp5 · Note
• https://github.com/remix-run/react-router/commit/09e6020d1950e54f361f7ad00938ecd4dde60929 · Note