Vulnerability · Published Jun 21, 2026 · Assigned by VulnCheck

CVE-2026-56239Capgo - Privilege Escalation via SECURITY DEFINER Function apply_usage_overage

High 7.6

In plain English

A high-severity privilege mismanagement in Capgo from Capgo. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 28% of all known vulnerabilities).

Severity (CVSS 3.1)7.6High

Exploit odds (30 days)0.3%top 71.7% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

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.

Affected products (as reported)

Vendor	Product	Versions
Capgo	Capgo	0 – before 12.128.2

Weakness: CWE-269 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:L

References

GHSA Advisory GHSA-qq85-vjrq-m75g vendor-advisory
VulnCheck Advisory: Capgo - Privilege Escalation via SECURITY DEFINER Function apply_usage_overage third-party-advisory