Capgo Authentication Bypass via Direct PostgREST org_users Table Write

Description

Capgo (capgo.app) exposes the legacy membership table public.org_users directly through Supabase PostgREST. The table's row-level security policies "Allow org admin to insert" and "Allow org admin to update" only verify that the caller has admin rights in the target organization (public.check_min_rights('admin', ...)); they do not require a pending invitation in tmp_users, acceptance of an invite token via /private/accept_invitation, any action by the target user, or the membership/role-consistency and anti-escalation checks enforced by the RBAC role-binding path. As a result, an authenticated user who is an admin of an organization can INSERT or UPDATE org_users rows directly to add any existing public.users account as an active member of that organization with user_right="admin", bypassing the invitation and role-assignment workflow entirely. In testing, an account with no prior access to the organization or its apps could, after such a direct insert, read the organization and app and pass check_min_rights. All versions are affected and no patch was available at the time of publication.

Scores

EPSS (exploitation in 30 days)

0.41% · top 65% of all CVEs (6 Nov 2026)

CISA SSVC

Exploitation: poc · Automatable: no · Technical impact: total

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.7.

Weakness

• CWE-863: Incorrect Authorization (opens in a new tab)All about CWE-863 and its CVEs

Affected products

• Cap-go · capgo.app

  • affected ≤ *

References (2)

• GitHub Security Advisory (GHSA-w349-9mc3-8c5x) (opens in a new tab)vendor-advisoryexploit
• VulnCheck Advisory: Capgo Authentication Bypass via Direct PostgREST org_users Table Write (opens in a new tab)third-party-advisory

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisories (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2026-100623](https://trackcve.app/badge/CVE-2026-100623.svg)](https://trackcve.app/cve/CVE-2026-100623)

Record last updated 30 Sept 2026, 17:20 UTC.