Path Equivalence Affecting rou3 package, versions <0.7.0
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.
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Test your applications- Snyk IDSNYK-JS-ROU3-14459107
- published17 Dec 2025
- disclosed16 Dec 2025
- creditGoksan
Introduced: 16 Dec 2025
CVE-2025-71399 (opens in a new tab)How to fix?
Upgrade rou3 to version 0.7.0 or higher.
Overview
rou3 is a Lightweight and fast router for JavaScript.
Affected versions of this package are vulnerable to Path Equivalence due to insufficient preservation of empty segments. An attacker can bypass access restrictions and rate limits by sending requests with multiple slashes in the URL path, which are normalized and treated as identical routes.