What’s Vulnerable › Vulnerabilities

CVE-2026-56327: Capgo - Unauthenticated Organization Existence Oracle via public.invite_user_to_org RPC

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-06-30 · updated 2026-10-25
• Weakness: CWE-203

Description

Capgo before 12.128.2 contains an information disclosure vulnerability in the public.invite_user_to_org RPC function that allows unauthenticated attackers to enumerate organization existence by observing distinct error responses. Attackers can call the SECURITY DEFINER function with a publishable API key to determine if an organization ID exists based on NO_ORG versus NO_RIGHTS responses, enabling tenant enumeration attacks.

Affected products

• Capgo: before 12.128.2 — fixed in 12.128.2

How to fix

Upgrade to a fixed version: Capgo 12.128.2. Check the vendor advisory for mitigations.

References

• https://github.com/Cap-go/capgo/security/advisories/GHSA-35q8-ghfg-vp6m
• https://www.vulncheck.com/advisories/capgo-unauthenticated-organization-existence-oracle-via-public-invite-user-to-org-rpc
• https://github.com/Cap-go/capgo/security/advisories/GHSA-35q8-ghfg-vp6m

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