Privilege escalation in Cap-Go Capgo
CVE-2026-56245
Supabase Capgo before 12.128.2 contains an authorization bypass vulnerability in the SECURITY DEFINER record_build_time RPC function that allows unauthenticated attackers to insert arbitrary build-time records. Attackers can exploit this by calling POST /rest/v1/rpc/record_build_time with a public API key to poison billing and quota data for any organization, enabling resource exhaustion and cross-tenant billing manipulation.
Vulnerability class: Privilege Escalation
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L.
EPSS exploit prediction
EPSS: 0.005 (37.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 38th percentile — 37.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: 0.000
Affected products
- Cap-Go Capgo — versions 0, 12.128.2
Weakness classification (CWE)
References
- github.com/Cap-go/capgo/security/advisories/GHSA-42f8-v563-5763 (vendor-advisory)
- www.vulncheck.com/advisories/supabase-capgo-unauthenticated-cross-tenant-build-… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-56245?
- CVE-2026-56245 is a high-severity vulnerability in Cap-Go Capgo, classified under Improper Privilege Management. CVSS score: 8.2/10. Published 2026-06-24.
- How severe is CVE-2026-56245?
- High severity. CVSS v3 base score is 8.2 out of 10.