Vulnerabilities CVE-2026-56296

CVE-2026-56296

Medium

Open

TLP:CLEAR

Cap-go - App Existence Oracle via Unauthenticated transfer_app RPC

NVD CVE.org

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Description

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.

Details

CVSS Score: 6.9
EPSS Score ⓘ: 0.24%

15.1th percentile
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
Confidence: 90%
Published: Jul 11, 2026
Last Modified: Jul 13, 2026

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