CVE-2026-56245

Supabase Capgo - Unauthenticated Cross-Tenant Build-Time Accounting Poisoning via record_build_time RPC

State: Published
Severity: 8.8 High
Published: Jun 24, 2026
Updated: Jun 24, 2026
Reserved: Jun 19, 2026

Description

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.

Scores

CVSS	Score	Vector	Source
4.0	8.8 High	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N	VulnCheck
3.1	8.2 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L	VulnCheck

Weaknesses

CWE-269 Improper Privilege Management

Affected Products

Product	Versions
capgoCap-go	before 12.128.2Affected 12.128.2Not affected

References

GitHub Security Advisory (GHSA-42f8-v563-5763)vendor-advisory
VulnCheck Advisory: Supabase Capgo - Unauthenticated Cross-Tenant Build-Time Accounting Poisoning via record_build_time RPCthird-party-advisory

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