CVE-2026-56213 Capgo - Unauthenticated Cross-Tenant Metrics Poisoning via upsert_version_meta RPC
Unauthenticated attackers can poison cross-tenant metrics via an exposed RPC endpoint, causing false data and incorrect alerts in Capgo update servers.
- 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-2026-56213?
CVE-2026-56213 is a medium-severity missing authorization vulnerability in 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
Capgo before 12.128.2 contains an authorization bypass vulnerability in the public.upsert_version_meta SECURITY DEFINER function exposed via PostgREST RPC, allowing unauthenticated attackers to insert arbitrary rows into version_meta for any app_id. Attackers can exploit this by calling the RPC endpoint with a public anon key to poison storage metrics, causing persistent false data in dashboards and triggering incorrect alerts across victim applications.
Weakness: CWE-862
Which versions are affected by CVE-2026-56213?
How do I fix CVE-2026-56213?
No fix has been published for CVE-2026-56213 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-2026-56213 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-56213 exists.
Sources
Also known as GHSA-5495-g4j9-gjwq, GHSA-g4hx-x8gc-x6rw.