Inefficient Algorithmic Complexity Affecting react-router package, versions >=7.0.0 <7.18.0
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
Do your applications use this vulnerable package?
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applications- Snyk IDSNYK-JS-REACTROUTER-18313148
- published26 Jul 2026
- disclosed24 Jul 2026
- creditLương Nguyễn Ngọc Đình
Introduced: 24 Jul 2026
NewCVE-2026-55685 (opens in a new tab)How to fix?
Upgrade react-router to version 7.18.0 or higher.
Overview
Affected versions of this package are vulnerable to Inefficient Algorithmic Complexity through inefficient route matching in the manifest endpoint. An attacker can cause excessive server load and degrade response times by sending unauthenticated targeted requests.
Note: This is only exploitable if the application is running in Framework Mode.