CVE-2026-56296: Cap-Go Capgo

Medium severity, CVSS 5.3. EPSS: 0.4% chance of exploitation in the next 30 days.

Cap-go before 12.128.2 contains an information disclosure vulnerability in the public.transfer_app RPC function that returns distinct error messages for existing versus non-existing app IDs. Unauthenticated attackers can enumerate valid app IDs by observing error message differences when calling transfer_app with only the publishable API key.

Affected products

• Cap-Go Capgo: before 12.128.2 (fixed in 12.128.2)

Published 2026-07-11. Last modified 2026-07-13.