Vulnerability 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.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://github.com/Cap-go/capgo/security/advisories/GHSA-qq85-vjrq-m75g
- https://www.vulncheck.com/advisories/capgo-privilege-escalation-via-security-def
- https://github.com/Cap-go/capgo/security/advisories/GHSA-qq85-vjrq-m75g
FAQ
What is CVE-2026-56239?
CVE-2026-56239 is a vulnerability with a CVSS score of 7.6 (HIGH). 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...
How severe is CVE-2026-56239?
CVE-2026-56239 has been rated HIGH with a CVSS base score of 7.6/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-56239?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.