High severity · published Jun 24, 2026
CVE-2026-56245
Supabase Capgo - Unauthenticated Cross-Tenant Build-Time Accounting Poisoning via record_build_time RPC
8.2
CVSS
0.3%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
High
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 27% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CA
capgo · Cap-go
before 12.128.2 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-56245
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-56245
github.com
https://github.com/Cap-go/capgo/security/advisories/GHSA-42f8-v563-5763
www.vulncheck.com
https://www.vulncheck.com/advisories/supabase-capgo-unauthenticated-cross-tenant-build-time-accounting-poisoning-via-record-build-time-rpc
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