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CVE-2026-56296 Details

ANALYZED

This CVE record has been analyzed and enriched by NVDAPI.com as an independent party.

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.

Metrics

CVSS 3.x Severity and Vector Strings:

VolerionCVSS-B:3.7 LOWVector:CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

CNA: [email protected]CVSS-B:5.3 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://github.com/Cap-go/capgo/security/advisories/GHSA-fmm3-3qcg-85j6	CISA-ADP	AdvisoryExploitRemedyVendor
https://github.com/Cap-go/capgo/security/advisories/GHSA-fmm3-3qcg-85j6	[email protected]	AdvisoryExploitRemedyVendor
https://www.vulncheck.com/advisories/cap-go-app-existence-oracle-via-unauthenticated-transfer-app-rpc	[email protected]	Advisory

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-203	Observable Discrepancy	[email protected]

Affected Products

Product	Versions
Cap-go	< 12.128.2 (semver)
CPE No CPEs found in CPE dictionary for this product. Remediation Upgrade: 12.128.2moderate effort

Change History

2 change records found show changes

Date	Action	Recorded By
Jul 13, 2026	CVE Modified	CISA-ADP
Jul 11, 2026	New CVE Received	[email protected]