High 8.5Published Aug 11, 2026

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

Updated under an hour ago (2026-10-19 08:50 UTC)

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Every CVE for Wei-Shaw sub2api

Exploited in the last 30 days

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.

CVSS: 8.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N
Weakness (CWE): CWE-22, CWE-441
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Deferred
Record last updated: Aug 11, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Wei-Shaw sub2api wei_shaw:sub2api (from the name)	from 0.1.135, <0.1.169	CNA record

References

https://github.com/Wei-Shaw/sub2api/security/advisories/GHSA-vrxq-qm4h-6hggx-refsource-confirm
https://github.com/Wei-Shaw/sub2api/pull/5137x-refsource-misc
https://github.com/Wei-Shaw/sub2api/commit/017f6bbd5edffea0639ef3c84c0391161983f1f3x-refsource-misc
https://github.com/Wei-Shaw/sub2api/releases/tag/v0.1.169x-refsource-misc

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.