Medium severity · published Jun 20, 2026
CVE-2026-56235
Capgo - Unauthenticated Cross-Tenant Metrics Disclosure via RPC Functions
5.3
CVSS
0.3%
EPSS
No
On KEV
Description
Cap-go capgo before 12.128.2 contains an authorization bypass in several Supabase PostgREST RPC functions (get_app_metrics, get_global_metrics, get_total_metrics) that are granted to the anon role without enforcing org membership or permission checks. An unauthenticated attacker using only the public Supabase API key (sb_publishable_*) can query arbitrary org_id values to disclose cross-tenant usage telemetry (MAU, bandwidth, installs, gets), enumerate app IDs for a target org, and determine org existence via an oracle (valid org returns metrics, invalid returns []).
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 28% 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-2026-56235
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-56235
github.com
https://github.com/Cap-go/capgo/security/advisories/GHSA-gfpq-vphf-6gcm
www.vulncheck.com
https://www.vulncheck.com/advisories/capgo-unauthenticated-cross-tenant-metrics-disclosure-via-rpc-functions
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