CVE-2026-56339

High

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.

SeverityHigh

CVSS7.5

Exploit probability—

ProductCap-go Capgo

PublishedJul 15, 2026

First seenJul 15, 2026

Weakness typeCWE-203CWE-203

How to fix

Update

Cap-go capgo12.128.2 or later

Vendor advisories

github.com/Cap-go/capgo/security/advisories/GHSA-8432-3cgm-vw5j

Affected products

Product	Affected versions	Fixed in
Cap-go capgo	v < 12.128.2	12.128.2

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