What is GHSA-fcmv-mqrc-fr3c?

GHSA-fcmv-mqrc-fr3c is a security advisory published by GitHub Security Advisories with Medium severity. Cap-go before 12.128.2 contains an information disclosure vulnerability in the public...

Which CVE IDs does GHSA-fcmv-mqrc-fr3c cover?

GHSA-fcmv-mqrc-fr3c covers the following CVE IDs: CVE-2026-56296. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-fcmv-mqrc-fr3c?

GHSA-fcmv-mqrc-fr3c has a CVSS v3 base score of 5.3, published by GitHub Security Advisories.

GHSA-fcmv-mqrc-fr3cMediumCVSS 5.3

Cap-go before 12.128.2 contains an information disclosure vulnerability in the public...

Vendor

GitHub Security Advisories

Published

July 11, 2026

Last Modified

July 11, 2026

🔗 CVE IDs covered (1)

CVE-2026-56296 →

📋 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.

🔗 References (4)

https://github.com/Cap-go/capgo/security/advisories/GHSA-fmm3-3qcg-85j6
https://nvd.nist.gov/vuln/detail/CVE-2026-56296
https://www.vulncheck.com/advisories/cap-go-app-existence-oracle-via-unauthenticated-transfer-app-rpc
https://github.com/advisories/GHSA-fcmv-mqrc-fr3c