What’s Vulnerable › Vulnerabilities

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

• Severity: high (CVSS 7.6 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-06-21 · updated 2026-06-24
• Weakness: CWE-269

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

• Capgo: before 12.128.2 — fixed in 12.128.2

How to fix

Upgrade to a fixed version: Capgo 12.128.2. Check the vendor advisory for mitigations.

References

• https://github.com/Cap-go/capgo/security/advisories/GHSA-qq85-vjrq-m75g
• https://www.vulncheck.com/advisories/capgo-privilege-escalation-via-security-definer-function-apply-usage-overage
• https://github.com/Cap-go/capgo/security/advisories/GHSA-qq85-vjrq-m75g

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