CVE-2026-56296 MEDIUM

CVE-2026-56296: Cap-go - App Existence Oracle via Unauthenticated transfer_app RPC

Vendor Cap-Go
Product capgo
Weakness CWE-203
Published July 11, 2026
Last update July 13, 2026
View on NVD All CVEs

CVSS base score

6.9/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality —
Integrity —

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

July 11, 2026 CVE published
July 13, 2026 Record updated