CVE-2026-56296
Cap-go - App Existence Oracle via Unauthenticated transfer_app RPC
- State
- Published
- Severity
- 6.9 Medium
- Published
- Jul 11, 2026
- Updated
- Jul 13, 2026
- Reserved
- Jun 20, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 6.9 Medium | 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 | VulnCheck |
| 3.1 | 5.3 Medium | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N | VulnCheck |
Weaknesses
- CWE-203 Observable Discrepancy
Affected Products
| Product | Versions |
|---|---|
capgoCap-go |
|
References
- GitHub Security Advisory (GHSA-fmm3-3qcg-85j6)vendor-advisory
- VulnCheck Advisory: Cap-go - App Existence Oracle via Unauthenticated transfer_app RPCthird-party-advisory
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