CVE-2026-18749: CWE-639: Authorization Bypass Through User-Controlled Key in CERT/CC VINCE
The type=track branch authorises on _is_my_case(t_attach.case) only and never checks VinceTrackAttachment.shared. A coordinator-uploaded case artefact that has NOT been marked shared is still retrievable by any case member who has (or is sent) its uuid — leaks not-yet-released coordinator material to vendors on the case.
AI Analysis
Technical Summary
The vulnerability in CERT/CC VINCE (CVE-2026-18749) involves an authorization bypass due to insufficient access control checks. Specifically, the 'type=track' branch authorizes access solely based on the _is_my_case(t_attach.case) check and neglects to verify the VinceTrackAttachment.shared attribute. Consequently, artefacts uploaded by coordinators that are not marked as shared remain accessible to any case member possessing the artefact's UUID, resulting in leakage of not-yet-released coordinator material to vendors associated with the case.
Potential Impact
This vulnerability allows unauthorized access to sensitive case artefacts that coordinators intended to keep private. Any case member who obtains or is sent the UUID of such an artefact can retrieve it, potentially exposing confidential coordinator information prematurely to vendors. This could undermine case confidentiality and trust among participants.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict distribution of artefact UUIDs to trusted parties only and review access control policies to ensure that artefact sharing flags are properly enforced.
CVE-2026-18749: CWE-639: Authorization Bypass Through User-Controlled Key in CERT/CC VINCE
Description
The type=track branch authorises on _is_my_case(t_attach.case) only and never checks VinceTrackAttachment.shared. A coordinator-uploaded case artefact that has NOT been marked shared is still retrievable by any case member who has (or is sent) its uuid — leaks not-yet-released coordinator material to vendors on the case.
CVSS v3.1
Score 9.8critical
Affected software
CERT/CC
VINCE
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability in CERT/CC VINCE (CVE-2026-18749) involves an authorization bypass due to insufficient access control checks. Specifically, the 'type=track' branch authorizes access solely based on the _is_my_case(t_attach.case) check and neglects to verify the VinceTrackAttachment.shared attribute. Consequently, artefacts uploaded by coordinators that are not marked as shared remain accessible to any case member possessing the artefact's UUID, resulting in leakage of not-yet-released coordinator material to vendors associated with the case.
Potential Impact
This vulnerability allows unauthorized access to sensitive case artefacts that coordinators intended to keep private. Any case member who obtains or is sent the UUID of such an artefact can retrieve it, potentially exposing confidential coordinator information prematurely to vendors. This could undermine case confidentiality and trust among participants.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict distribution of artefact UUIDs to trusted parties only and review access control policies to ensure that artefact sharing flags are properly enforced.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- certcc
- Date Reserved
- 2026-08-03T21:27:40.008Z
- State
- PUBLISHED
Threat ID: 6a7ce514bf8831d5392fb5d0
Added to database: 08/12/2026, 21:26:44 UTC
Last enriched: 08/12/2026, 21:42:33 UTC
Last updated: 09/25/2026, 04:14:08 UTC
Views: 48
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