---
id: CVE-2026-56213
title: >-
  Capgo - Unauthenticated Cross-Tenant Metrics Poisoning via upsert_version_meta
  RPC
summary: >-
  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…
severity: medium
cvss: 5.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N'
cvssSource: cna
cwe:
  - CWE-862
vendor: Capgo
product: Capgo
affected:
  - Capgo < 12.128.2
ssvc:
  exploitation: poc
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-06-22T14:22:13.228614Z'
exploitAvailable: true
published: '2026-06-20'
updated: '2026-11-08'
sourceUpdated: '2026-11-08T14:05:34.654Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-56213'
references:
  - url: 'https://github.com/Cap-go/capgo/security/advisories/GHSA-g4hx-x8gc-x6rw'
    label: GitHub Security Advisory (GHSA-g4hx-x8gc-x6rw)
  - url: >-
      https://www.vulncheck.com/advisories/capgo-unauthenticated-cross-tenant-metrics-poisoning-via-upsert-version-meta-rpc
    label: >-
      VulnCheck Advisory: Capgo - Unauthenticated Cross-Tenant Metrics Poisoning
      via upsert_version_meta RPC
tags:
  - cve.org
  - exploit-available
epss: 0.00353
epssPercentile: 0.29134
ingestedAt: '2026-11-08T14:51:22.368Z'
---

## Overview

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

- `Capgo < 12.128.2`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.