CVE-2026-56082 Capgo - Unauthenticated Cross-Tenant Billing Log Tampering via public.record_build_time RPC
Unauthenticated attackers can tamper with cross-tenant billing logs and inflate build times via an exposed RPC function, requiring an upgrade to Capgo.
- 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-2026-56082?
CVE-2026-56082 is a high-severity missing authorization vulnerability in Cap-go capgo, published on 19 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Capgo (Cap-go/capgo) before 12.128.2 contains an improper access control vulnerability in the SECURITY DEFINER PostgREST RPC function public.record_build_time, which is granted to the anon role and callable with only the public Supabase publishable (sb_publishable_*) anon key. An unauthenticated attacker can insert rows into public.build_logs for arbitrary organizations and, because the function uses ON CONFLICT (build_id, org_id) DO UPDATE, can overwrite existing usage/billing records by reusing the same build_id for a target org. This enables cross-tenant tampering of billing build logs and financial-impact denial of service by inflating billable build time.
Weakness: CWE-284
Which versions are affected by CVE-2026-56082?
How do I fix CVE-2026-56082?
No fix has been published for CVE-2026-56082 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-2026-56082 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-56082 exists.
Sources
Also known as GHSA-42xj-3h9w-26h5, GHSA-4q75-4379-394h.