CVE-2026-56296

MEDIUM SEVERITY

CVSS Score & Metrics

Base Score

5.3 / 10

Vector String

                                        CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N                                    

Vulnerability 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.

Vulnerability Details

Published Date

July 11, 2026

Last Modified

July 11, 2026

CWE ID

CWE-203

Source

NVD

Vendor

Cap-go

Product

capgo

External References

https://github.com/Cap-go/capgo/security/advisories/GHSA-fmm3-3qcg-85j6
https://www.vulncheck.com/advisories/cap-go-app-existence-oracle-via-unauthenticated-transfer-app-rpc

CVE-2026-56296

CVSS Score & Metrics

Vulnerability Description

Vulnerability Details

External References

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