CVE-2026-56239 Capgo - Privilege Escalation via SECURITY DEFINER Function apply_usage_overage
Authenticated users can escalate privileges to manipulate billing data for arbitrary organizations due to missing authorization checks in a database function.
- 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-2026-56239?
CVE-2026-56239 is a high-severity vulnerability in Capgo, published on 21 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Capgo before 12.128.2 contains a potential privilege escalation vulnerability in the public.apply_usage_overage SECURITY DEFINER function, which performs sensitive billing operations without enforcing internal authorization checks (no validation of auth.uid(), org membership, or check_min_rights). Because the function runs with the owner's privileges, it bypasses Row Level Security. If EXECUTE permission is available to the authenticated or anon roles (explicitly or via default privileges), an authenticated user could invoke it via Supabase RPC to manipulate billing data for arbitrary organizations, including unauthorized credit depletion and fraudulent overage event insertion.
Weakness: CWE-269
Which versions are affected by CVE-2026-56239?
How do I fix CVE-2026-56239?
No fix has been published for CVE-2026-56239 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-56239 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-56239 exists.
Sources
Also known as GHSA-7vcj-gm5g-5g9p, GHSA-qq85-vjrq-m75g.