CVE-2026-56213

Capgo - Unauthenticated Cross-Tenant Metrics Poisoning via upsert_version_meta RPC

CVSS 6.9 MEDIUMEPSS 0.2%CWE-862

Vexday Risk Score

13Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 6.9EPSS 0.2%KEV nãoPoC —Nuclei —Metasploit —Patch referenciado

Lifecycle

20 Jun 2026Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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.

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N

Affected products

Capgo · Capgo

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References

https://github.com/Cap-go/capgo/security/advisories/GHSA-g4hx-x8gc-x6rw https://www.vulncheck.com/advisories/capgo-unauthenticated-cross-tenant-metrics-poisoning-via-upsert-version-meta-rpc