CVE-2026-56245

EUVD-2026-38742
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
8.2 HIGH
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L
Awaiting analysis
This vulnerability is currently awaiting analysis.
Base Score
CVSS 3.x
EPSS Score
Percentile: 18%
Common Weakness Enumeration
References
https://github.com/Cap-go/capgo/security/advisories/GHSA-42f8-v563-5763
https://www.vulncheck.com/advisories/supabase-capgo-unauthenticated-cross-tenant-build-time-accounting-poisoning-via-record-build-time-rpc
https://github.com/Cap-go/capgo/security/advisories/GHSA-42f8-v563-5763