CVE-2026-56296CWE-203

Cap-go - App Existence Oracle via Unauthenticated transfer_app RPC

Medium · published July 11, 2026

CVSS v4.0
6.9
EPSS
0%
Percentile
28.4
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
6.9 · MEDIUM
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
EPSS
0.00358 · 28.4th percentile
Weakness
CWE-203 · Observable Discrepancy
Published
2026-07-11T13:00Z
EPSS history
Timeline
  • 11 JUL 13:00Z
    Cap-go - App Existence Oracle via Unauthenticated transfer_app RPC
    cvelistv5