Auth bypass in Capgo
CVE-2026-56213
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.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.
EPSS exploit prediction
EPSS: 0.004 (26.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 26th percentile — 26.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
- Capgo — versions 0, 12.128.2
Weakness classification (CWE)
References
- github.com/Cap-go/capgo/security/advisories/GHSA-g4hx-x8gc-x6rw (vendor-advisory)
- www.vulncheck.com/advisories/capgo-unauthenticated-cross-tenant-metrics-poisoni… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-56213?
- CVE-2026-56213 is a medium-severity vulnerability in Capgo, classified under Missing Authorization. CVSS score: 5.3/10. Published 2026-06-20.
- How severe is CVE-2026-56213?
- Medium severity. CVSS v3 base score is 5.3 out of 10.