CVE-2026-56339

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.

Score

CVSS 4.0 8.7 High

Status

Deferred - disclosure@vulncheck.com

Published

2026-07-15

Last modified

2026-10-24

Weaknesses

CWE-203

Affected products

• Capgo (Cap-go)

References

• https://github.com/Cap-go/capgo/security/advisories/GHSA-8432-3cgm-vw5j
• https://www.vulncheck.com/advisories/capgo-unauthenticated-organization-existence-enumeration-via-rescind-invitation-rpc