Vulnerability · Published Jun 20, 2026 · Assigned by VulnCheck

CVE-2026-56213Capgo - Unauthenticated Cross-Tenant Metrics Poisoning via upsert_version_meta RPC

Medium 5.3

In plain English

A medium-severity missing authorization in Capgo from Capgo. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 29% of all known vulnerabilities).

Severity (CVSS 3.1)5.3Medium

Exploit odds (30 days)0.4%top 70.9% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

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.

Affected products (as reported)

Vendor	Product	Versions
Capgo	Capgo	0 – before 12.128.2

Weakness: CWE-862 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

References

GHSA Advisory GHSA-g4hx-x8gc-x6rw vendor-advisory
VulnCheck Advisory: Capgo - Unauthenticated Cross-Tenant Metrics Poisoning via upsert_version_meta RPC third-party-advisory