Sub2API wildcard route lets tenants relay to arbitrary upstream URLs

high severity · published 2026-08-11

An authenticated tenant can relay requests to arbitrary upstream endpoints through a wildcard route that splices client input into the upstream URL with no validation. The attacker spends or abuses quota from the operator's pooled provider accounts, such as shared ChatGPT/Codex OAuth accounts or OpenAI platform keys.

CVE: CVE-2026-73079

Source: NVD

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