CVE-2026-56235 Capgo - Unauthenticated Cross-Tenant Metrics Disclosure via RPC Functions
Unauthenticated attackers can access cross-tenant usage metrics and enumerate app IDs by exploiting missing authorization checks in Capgo RPC functions.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-56235?
CVE-2026-56235 is a medium-severity missing authorization vulnerability in Cap-go capgo, published on 20 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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 []).
Weakness: CWE-200
Which versions are affected by CVE-2026-56235?
How do I fix CVE-2026-56235?
No fix has been published for CVE-2026-56235 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-56235 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-56235 exists.
Sources
Also known as GHSA-g938-xgc8-q827, GHSA-gfpq-vphf-6gcm.