CVE-2026-56247
Summary
by MITRE • 07/01/2026
Capgo before 12.128.2 allows org admins to assign org-scoped RBAC roles at app scope without validating role scope compatibility, including to pending invitees. Attackers can pre-seed malformed high-privilege bindings that survive invite acceptance, enabling accepted low-privilege users to perform unauthorized privileged app actions.
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Analysis
by VulDB Data Team • 07/01/2026
This vulnerability resides in the Capgo platform's role-based access control implementation prior to version 12.128.2, representing a critical privilege escalation flaw that undermines the fundamental security boundaries of organizational access management. The core technical issue stems from insufficient validation mechanisms within the RBAC system where organization administrators can assign roles at application scope without verifying whether these roles are compatible with the organizational scope context. This design flaw creates a dangerous permission mismatch condition where administrative controls fail to enforce proper scope boundaries, allowing for cross-scope privilege assignment that violates basic security principles of least privilege and scope isolation.
The operational impact of this vulnerability is particularly severe as it enables attackers to exploit the invitation workflow itself as a vector for privilege escalation. When organization administrators assign high-privilege roles to pending invitees, the system fails to validate that these role assignments conform to organizational scope limitations before the invitees accept their invitations. This creates a window where malicious actors can pre-seed malformed role bindings with elevated privileges that persist even after the invitation acceptance process completes. The vulnerability specifically targets the gap between role assignment and role validation, allowing attackers to establish privileged access states that are not properly constrained by the organizational boundaries they should respect.
From a cybersecurity perspective, this vulnerability maps directly to CWE-284 Access Control Issues, specifically addressing improper access control enforcement within role management systems. It also aligns with ATT&CK technique T1078 Valid Accounts, as attackers can leverage legitimate invitation workflows to achieve unauthorized privileged access without detection. The flaw represents a classic case of insufficient input validation and privilege scope checking, where the system assumes that administrative users have proper authorization to assign any role regardless of scope compatibility constraints.
The security implications extend beyond simple privilege escalation to include potential data exfiltration, configuration manipulation, and unauthorized system modifications that could affect entire organizational applications. Attackers can exploit this vulnerability by first identifying organization administrators who have access to role assignment functions, then crafting malicious role assignments that grant excessive privileges to pending users. These privileges survive the invitation acceptance process due to the lack of scope validation, creating persistent backdoors for attackers to perform unauthorized actions within application contexts. Organizations using Capgo prior to version 12.128.2 remain vulnerable to this attack vector as long as the underlying RBAC validation logic has not been patched.
Mitigation strategies must focus on implementing strict scope validation mechanisms that enforce role compatibility checks before any role assignments are finalized, particularly during invitation workflows. Organizations should immediately update to Capgo version 12.128.2 or later where this vulnerability has been addressed through enhanced validation of role scope boundaries. Additionally, security teams should conduct comprehensive audits of existing role assignments to identify and revoke any improperly scoped privileges that may have been established prior to the patch deployment. Implementing continuous monitoring of role assignment activities and establishing automated alerts for cross-scope privilege changes can help detect potential exploitation attempts before they result in successful unauthorized access incidents.