CVE-2026-56082

Deferred Deferred - Pending Action

Improper Access Control in Capgo PostgREST RPC Function

Publication date: 2026-06-19

Last updated on: 2026-06-22

Assigner: VulnCheck

Description

Capgo (Cap-go/capgo) before 12.128.2 contains an improper access control vulnerability in the SECURITY DEFINER PostgREST RPC function public.record_build_time, which is granted to the anon role and callable with only the public Supabase publishable (sb_publishable_*) anon key. An unauthenticated attacker can insert rows into public.build_logs for arbitrary organizations and, because the function uses ON CONFLICT (build_id, org_id) DO UPDATE, can overwrite existing usage/billing records by reusing the same build_id for a target org. This enables cross-tenant tampering of billing build logs and financial-impact denial of service by inflating billable build time.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-06-19

Last Modified

2026-06-22

Generated

2026-07-10

AI Q&A

2026-06-20

EPSS Evaluated

2026-07-08

NVD

CVE-2026-56082

EUVD

EUVD-2026-38096

Affected Vendors & Products

Vendor	Product	Version / Range
capgo	capgo	to 12.128.2 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-284	The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.

Attack-Flow Graph

Executive Summary

This vulnerability exists in Capgo versions before 12.128.2 and involves improper access control in a SECURITY DEFINER PostgREST RPC function named public.record_build_time.

The function is granted to the anon role and can be called using only the public Supabase publishable anon key, meaning no authentication is required.

An unauthenticated attacker can insert rows into the public.build_logs table for any organization and overwrite existing usage or billing records by reusing the same build_id for a target organization.

This allows cross-tenant tampering of billing build logs and can cause denial of service by inflating billable build time.

Impact Analysis

The vulnerability can lead to unauthorized modification of billing and usage records across different tenants or organizations.

An attacker can overwrite existing billing data, potentially causing financial damage by inflating billable build time.

This can result in denial of service related to financial operations and loss of trust in the integrity of billing information.

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