CVE-2026-44373

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

CVSS 5.3 MEDIUMEPSS 0.4%CWE-22

Vexday Risk Score

13Bajo

Decisión SSVC (CISA)

Track

Sin señal de explotación → monitorear

CVSS 5.3EPSS 0.4%KEV nãoPoC —Nuclei —Metasploit —Patch —

Ciclo de vida

13 may 2026Publicada en NVD

Recomendación: Monitorear — sin señal de explotación por ahora.

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.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Productos afectados

nitrojs · nitro nitrojs · nitropack

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Referencias

https://github.com/nitrojs/nitro/pull/4222 https://github.com/nitrojs/nitro/pull/4223 https://github.com/nitrojs/nitro/releases/tag/v2.13.4 https://github.com/nitrojs/nitro/releases/tag/v3.0.260429-beta https://github.com/nitrojs/nitro/security/advisories/GHSA-5w89-w975-hf9q