Description
A proxy route rule like:
is intended to limit the proxy to URLs under /api/orders/. Before the patch, an attacker could bypass that scope by sending percent-encoded path traversal (..%2f) in the URL, causing Nitro to forward a request that the upstream resolved outside the configured scope. Example exploit:
Nitro sees ..%2f as opaque characters at match time, the /api/orders/** rule matched, and the raw path was forwarded to the upstream as /orders/..%2fadmin/config.json.
Recommendation
Update the nitropack package to the latest compatible version. Followings are version details:
- Affected version(s): < 2.13.4
- Patched version(s): 2.13.4
References
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Start a free scanRelated Issues
- Nitro has a proxy scope bypass via percent-encoded path traversal in `routeRules` - nitro - CVE-2026-44373
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- Nitro has an Open Redirect via Protocol-Relative URL Bypass in Wildcard Route Rules - CVE-2026-44372
- Nitro has an Open Redirect via Protocol-Relative URL Bypass in Wildcard Route Rules - nitro - CVE-2026-44372
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See something that needs correcting? Let us knowUpdated May 14, 2026