CVE-2026-18744: CWE-639: Authorization Bypass Through User-Controlled Key in CERT/CC VINCE
Any authenticated case participant can fetch any OTHER vendor's CaseStatement + per-vul CaseMemberStatus by supplying that member's id — test_func only checks _is_my_case, not ownership of kwargs['member']. Bypasses share_status; leaks embargoed vendor affected/not-affected + statement text cross-tenant.
AI Analysis
Technical Summary
This vulnerability (CWE-639) in CERT/CC VINCE involves improper authorization checks where an authenticated user can supply another member's ID to retrieve sensitive information such as CaseStatement and CaseMemberStatus belonging to other vendors. The function test_func fails to verify ownership of the member ID, only checking if the case is associated with the user, enabling cross-tenant data leakage of embargoed vendor statuses and statements.
Potential Impact
The vulnerability allows unauthorized disclosure of sensitive and embargoed information about vendors, including their affected or not-affected status and detailed statement texts. This cross-tenant data leakage compromises confidentiality of vendor-specific case data within the VINCE system.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict access to authenticated case participants carefully and monitor for unauthorized access attempts involving member ID parameters.
CVE-2026-18744: CWE-639: Authorization Bypass Through User-Controlled Key in CERT/CC VINCE
Description
Any authenticated case participant can fetch any OTHER vendor's CaseStatement + per-vul CaseMemberStatus by supplying that member's id — test_func only checks _is_my_case, not ownership of kwargs['member']. Bypasses share_status; leaks embargoed vendor affected/not-affected + statement text cross-tenant.
CVSS v3.1
Score 6.5medium
Affected software
CERT/CC
VINCE
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CWE-639) in CERT/CC VINCE involves improper authorization checks where an authenticated user can supply another member's ID to retrieve sensitive information such as CaseStatement and CaseMemberStatus belonging to other vendors. The function test_func fails to verify ownership of the member ID, only checking if the case is associated with the user, enabling cross-tenant data leakage of embargoed vendor statuses and statements.
Potential Impact
The vulnerability allows unauthorized disclosure of sensitive and embargoed information about vendors, including their affected or not-affected status and detailed statement texts. This cross-tenant data leakage compromises confidentiality of vendor-specific case data within the VINCE system.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict access to authenticated case participants carefully and monitor for unauthorized access attempts involving member ID parameters.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- certcc
- Date Reserved
- 2026-08-03T21:13:39.481Z
- State
- PUBLISHED
Threat ID: 6a7ce514bf8831d5392fb5cc
Added to database: 08/12/2026, 21:26:44 UTC
Last enriched: 08/12/2026, 21:42:39 UTC
Last updated: 09/26/2026, 13:47:43 UTC
Views: 29
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