CVE-2026-56082
highpriority · track · 0EPSS 0.004 · 31 %ileEUEPSS · scored 2026-10-27
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
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.6–8.7
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (1)
Products and version ranges known to be affected.
also known as (3)
Other names and identifiers for this entity.
sources
Which sources assert this record, and when.
references (6)
External citations — patches, advisories, analysis.
- https://github.com/Cap-go/capgo/security/advisories/GHSA-42xj-3h9w-26h5cnnvd
- https://www.vulncheck.com/advisories/supabase-unauthenticated-cross-tenant-billing-log-tampering-via-public-record-build-time-rpccnnvd
- https://github.com/Cap-go/capgo/security/advisories/GHSA-42xj-3h9w-26h5enisa_euvd
- https://www.vulncheck.com/advisories/supabase-unauthenticated-cross-tenant-billing-log-tampering-via-public-record-build-time-rpcenisa_euvd
- https://github.com/Cap-go/capgo/security/advisories/GHSA-42xj-3h9w-26h5nvd
- https://www.vulncheck.com/advisories/supabase-unauthenticated-cross-tenant-billing-log-tampering-via-public-record-build-time-rpcnvd
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