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CVE-2026-73079— Sub2API: Path traversal in the Responses subpath routes lets an authenticated tenant relay requests to arbitrary upstream endpoints using pooled account credentials

Quick assessment

Affected
Wei-Shaw sub2api
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Wesley Liddick Sub2API是Wesley Liddick个人开发者开源的一个订阅转换接口的应用网关。 Wesley Liddick Sub2API 0.1.135版本至0.1.169之前版本存在安全漏洞，该漏洞源于对客户端提供的子路径未进行验证便拼接到上游URL，可能导致经过身份验证的租户通过路径遍历使用池化账号凭据向任意上游端点中继请求。

CVSS 8.5 · High EPSS 0.31% · P24

Affected Version Matrix 1

VendorProduct Version RangeStatus
Wei-Shaw sub2api >= 0.1.135, <0.1.169 affected
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I. Basic Information for CVE-2026-73079

Vulnerability Information
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Vulnerability Title
Sub2API: Path traversal in the Responses subpath routes lets an authenticated tenant relay requests to arbitrary upstream endpoints using pooled account credentials
Source: CVE Program / CVE List V5
Vulnerability Description
Sub2API is an AI API gateway platform designed to distribute and manage API quotas from AI product subscriptions. From 0.1.135, to 0.1.168, platform API keys issued to tenants are exchanged for upstream requests made with shared provider accounts (ChatGPT/Codex OAuth, OpenAI platform keys, or an operator-configured base URL) that belong to the operator, not to the caller. The `POST /responses/*subpath` wildcard routes spliced the client-supplied subpath into the upstream URL with no validation. This lets an authenticated tenant relay requests to arbitrary upstream endpoints using pooled account credentials via a path traversal. This vulnerability is fixed in 0.1.169.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5
Vulnerability Title
Wesley Liddick Sub2API 路径遍历漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Wesley Liddick Sub2API是Wesley Liddick个人开发者开源的一个订阅转换接口的应用网关。 Wesley Liddick Sub2API 0.1.135版本至0.1.169之前版本存在安全漏洞，该漏洞源于对客户端提供的子路径未进行验证便拼接到上游URL，可能导致经过身份验证的租户通过路径遍历使用池化账号凭据向任意上游端点中继请求。
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

Vendor Product Affected Versions CPE Subscribe
Wei-Shaw sub2api >= 0.1.135, <0.1.169 -

II. Public POCs for CVE-2026-73079

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 7363 chars
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III. Intelligence Information for CVE-2026-73079

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Patches & Fixes for CVE-2026-73079 (1)

Vendor Advisories for CVE-2026-73079 (1)

Other References for CVE-2026-73079 (1)

IV. Related Vulnerabilities

Same product: sub2api
Same vendor: Wei-Shaw
Same weakness: CWE-22

V. Comments for CVE-2026-73079

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