CVE-2026-73079 Path traversal in sub2api
Authenticated tenants can exploit path traversal in Sub2API to relay requests to arbitrary upstream endpoints using operator credentials.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-73079?
CVE-2026-73079 is a high-severity path traversal vulnerability in Wei-Shaw sub2api, published on 11 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Which versions are affected by CVE-2026-73079?
How do I fix CVE-2026-73079?
No fix has been published for CVE-2026-73079 yet. Limit exposure of the affected software until one is available.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2026-73079 being exploited?
There is no known exploitation of CVE-2026-73079 in the wild and no public exploit code.
Sources
Also known as GHSA-vrxq-qm4h-6hgg.