CVE-2026-44373— Nitro: Proxy scope bypass via percent-encoded path traversal in `routeRules`
Possible ATT&CK Techniques 1AI
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I. Basic Information for CVE-2026-44373
Vulnerability Information
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Vulnerability Title
Nitro: Proxy scope bypass via percent-encoded path traversal in `routeRules`
Source: NVD (National Vulnerability Database)
Vulnerability Description
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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: NVD (National Vulnerability Database)
Vulnerability Title
Nitro 路径遍历漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Nitro是Nitro开源的一个零配置的生产级服务器扩展工具。 Nitro 3.0.260429-beta之前版本存在路径遍历漏洞，该漏洞源于攻击者可通过在URL中发送百分比编码的路径遍历，导致Nitro将请求转发到配置范围之外的上游。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2026-44373
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- https://github.com/nitrojs/nitro/pull/4222x_refsource_MISC
- https://github.com/nitrojs/nitro/pull/4223x_refsource_MISC
- https://github.com/nitrojs/nitro/releases/tag/v2.13.4x_refsource_MISC
- https://github.com/nitrojs/nitro/releases/tag/v3.0.260429-betax_refsource_MISC
- https://github.com/nitrojs/nitro/security/advisories/GHSA-5w89-w975-hf9qx_refsource_CONFIRM
- https://nvd.nist.gov/vuln/detail/CVE-2026-44373
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