CVE-2026-56339 Details
Description
Capgo (Cap-go/capgo) before 12.128.2 contains an information disclosure vulnerability in the Supabase PostgREST SECURITY DEFINER RPC function public.rescind_invitation that allows unauthenticated attackers to enumerate organization existence. The function returns distinct error messages (NO_ORG vs NO_RIGHTS) when called with only a publishable API key, enabling attackers to discover valid organization IDs and increase the attack surface for targeted phishing or social engineering campaigns.
An information disclosure vulnerability has been identified in Capgo versions prior to 12.128.2. The issue resides in the Supabase PostgREST RPC function 'public.rescind_invitation', which is publicly accessible with the project's publishable API key. This function allows unauthenticated attackers to enumerate the existence of organizations by returning different error messages based on the validity of the organization ID provided. This vulnerability could be exploited to discover valid organization IDs, potentially leading to targeted phishing or social engineering attacks.
Users are advised to update to Capgo version 12.128.2 or later. It is also recommended to remove the execution grant for anonymous users on the 'rescind_invitation' function, require authenticated sessions, and consolidate the response to avoid disclosing specific organization-related error messages.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Jul 15, 2026CISA-ADP
Assessed Jul 15, 2026References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/Cap-go/capgo/security/advisories/GHSA-8432-3cgm-vw5j | CISA-ADP | AdvisoryExploitRemedyVendor |
| https://github.com/Cap-go/capgo/security/advisories/GHSA-8432-3cgm-vw5j | [email protected] | AdvisoryExploitRemedyVendor |
| https://www.vulncheck.com/advisories/capgo-unauthenticated-organization-existence-enumeration-via-rescind-invitation-rpc | [email protected] | Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-203 | Observable Discrepancy | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| Capgo | < 12.128.2 (semver) |
CPE
Remediation
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Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 15, 2026 | CVE Modified | CISA-ADP |
| Jul 15, 2026 | New CVE Received | [email protected] |