CVE-2026-56310
Received Received - Intake
Authorization Bypass in Cap-go via Limited API Keys

Publication date: 2026-06-24

Last updated on: 2026-06-24

Assigner: VulnCheck

Description
Cap-go before 12.128.2 contains an authorization bypass vulnerability in the GET /organization/members endpoint that allows org-limited API keys to bypass limited_to_orgs restrictions. Attackers with org-limited API keys can read membership data including uid, email, image_url, role, and is_tmp from organizations outside their assigned scope.
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Meta Information
Published
2026-06-24
Last Modified
2026-06-24
Generated
2026-06-24
AI Q&A
2026-06-24
EPSS Evaluated
N/A
NVD
CVE-2026-56310
EUVD
EUVD-2026-38750
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
cap-go cap-go to 12.128.2 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-285 The product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action.
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Mitigation Strategies

To mitigate this vulnerability, you should upgrade Cap-go to version 12.128.2 or later, where the authorization bypass issue in the GET /organization/members endpoint has been fixed.

Additionally, review and restrict the use of org-limited API keys to minimize exposure until the patch is applied.

Executive Summary

CVE-2026-56310 is an authorization bypass vulnerability in Cap-go versions before 12.128.2. It affects the GET /organization/members endpoint, allowing API keys that are limited to specific organizations to bypass their restrictions. This means attackers with such org-limited API keys can access membership data from organizations outside their assigned scope.

  • The exposed membership data includes user IDs (uid), email addresses, profile image URLs, roles, and temporary status flags.

The root cause is improper authorization enforcement where the endpoint fails to enforce the API key's organization scope after basic role-based access control (RBAC) checks.

Impact Analysis

This vulnerability can lead to unauthorized disclosure of sensitive membership information from organizations that an attacker should not have access to.

  • Attackers can read user identifiers, email addresses, profile images, roles, and temporary status flags of members in organizations outside their authorized scope.

Such unauthorized access can compromise privacy and potentially aid further attacks or social engineering by exposing internal organizational membership details.

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