CVE-2026-56217 in Capgo
Summary
by MITRE • 07/08/2026
Capgo before 12.128.2 contains a policy bypass vulnerability in app_versions update enforcement that allows app-scoped API keys to downgrade encrypted bundles to non-encrypted state. Attackers with app-scoped all API keys can directly update the app_versions table via PostgREST to clear session_key and key_id fields, bypassing organization-enforced encrypted-bundle policies and weakening OTA security controls.
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Analysis
by VulDB Data Team • 07/08/2026
This vulnerability resides in the Capgo platform version prior to 12.128.2 where a policy bypass flaw exists within the app_versions update enforcement mechanism. The technical implementation allows for unauthorized modification of encryption states through manipulation of the underlying database layer, specifically targeting the app_versions table structure. The flaw stems from insufficient access controls and validation checks that should normally enforce organization-level security policies but are circumvented by app-scoped API keys with elevated privileges. This represents a critical weakness in the platform's authorization model where individual application-level credentials can be leveraged to override system-wide security configurations that govern encrypted bundle enforcement.
The operational impact of this vulnerability extends beyond simple privilege escalation as it fundamentally undermines the Over-The-Air update security controls that organizations rely upon for mobile application distribution. Attackers with app-scoped all API keys can directly manipulate PostgREST endpoints to modify the app_versions table, specifically targeting and clearing the session_key and key_id fields that normally maintain encryption integrity. This action effectively downgrades encrypted bundles to non-encrypted state, eliminating the cryptographic protection that should safeguard sensitive application data during transit and installation phases. The vulnerability creates a persistent backdoor that allows attackers to weaken security controls at the organizational level while maintaining operational access through legitimate application credentials.
From a cybersecurity perspective, this vulnerability aligns with CWE-285 which addresses improper authorization issues in software systems, particularly when application-scoped permissions are incorrectly validated against organization-wide security policies. The flaw also maps to ATT&CK technique T1078 which covers valid accounts and privilege escalation through legitimate system access, though in this case the escalation occurs through database manipulation rather than traditional user account compromise. The vulnerability demonstrates a failure in implementing proper defense-in-depth principles where multiple security layers should have prevented such bypass scenarios. Organizations using Capgo may experience significant security degradation when attackers exploit this flaw, as it allows them to circumvent encryption policies that are typically enforced at the organizational level.
The mitigation strategy requires immediate patching of the Capgo platform to version 12.128.2 or later where proper access controls have been implemented to prevent app-scoped API keys from modifying encryption-related fields in the app_versions table. Additional defensive measures should include implementing stricter database access controls through role-based permissions that prevent modification of critical security fields by application-level credentials. Organizations should also conduct comprehensive audits of their API key usage and implement monitoring solutions that can detect unauthorized modifications to encryption state fields within the app_versions table, particularly when such changes occur in rapid succession or from unusual network locations. Regular security assessments should verify that organizational-level security policies are properly enforced regardless of the credential scope used for access.