CVE-2026-44373

MEDIUM5.3

Nitro: Proxy scope bypass via percent-encoded path traversal in `routeRules`

Published May 13, 2026

Modified 2 days ago

Details

Nitro is a next generation server toolkit. Prior to 3.0.260429-beta, an attacker could bypass a proxy route rule by sending percent-encoded path traversal (..%2f) in the URL, causing Nitro to forward a request that the upstream resolved outside the configured scope. This vulnerability is fixed in 3.0.260429-beta.

References

WEB

https://github.com/nitrojs/nitro/pull/4222

WEB

https://github.com/nitrojs/nitro/pull/4223

WEB

https://github.com/nitrojs/nitro/releases/tag/v2.13.4

WEB

https://github.com/nitrojs/nitro/releases/tag/v3.0.260429-beta

WEB

https://github.com/nitrojs/nitro/security/advisories/GHSA-5w89-w975-hf9q

ADVISORY