CVE-2026-56245 Supabase Capgo - Unauthenticated Cross-Tenant Build-Time Accounting Poisoning via record_build_time RPC
Unauthenticated attackers can poison billing and quota data for any organization via the record_build_time RPC, enabling resource exhaustion and cross-tenant manipulation.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-56245?
CVE-2026-56245 is a high-severity missing authorization vulnerability in Cap-go capgo, published on 24 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Supabase Capgo before 12.128.2 contains an authorization bypass vulnerability in the SECURITY DEFINER record_build_time RPC function that allows unauthenticated attackers to insert arbitrary build-time records. Attackers can exploit this by calling POST /rest/v1/rpc/record_build_time with a public API key to poison billing and quota data for any organization, enabling resource exhaustion and cross-tenant billing manipulation.
Weakness: CWE-269
Which versions are affected by CVE-2026-56245?
How do I fix CVE-2026-56245?
No fix has been published for CVE-2026-56245 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-56245 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-56245 exists.
Sources
Also known as GHSA-42f8-v563-5763.