Auth bypass in Suitenumerique Messages
CVE-2026-3739
A security flaw has been discovered in suitenumerique messages 0.2.0. This issue affects the function ThreadAccessSerializer of the file src/backend/core/api/serializers.py of the component ThreadAccess. The manipulation results in imprope…
Vulnerability class: Broken Authentication
EPSS: 0.001 (31.1th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.
Affected products
- Suitenumerique Messages — versions 0.2.0, 0.3.0
Weakness classification (CWE)
References
- VDB-349717 | suitenumerique messages ThreadAccess serializers.py ThreadAccessSerializer improper authentication (technical-description, vdb-entry)
- VDB-349717 | CTI Indicators (IOB, IOC, IOA) (signature, permissions-required)
- Submit #767329 | La Suite Numerique messages 0.2.0 IDOR (third-party-advisory)
- cna@vuldb.com (exploit)
- cna@vuldb.com (issue-tracking, patch)
- cna@vuldb.com (patch)
- cna@vuldb.com (patch)
- cna@vuldb.com (product)
Frequently asked questions
- What is CVE-2026-3739?
- CVE-2026-3739 is a medium-severity vulnerability in Suitenumerique Messages, classified under Improper Authentication. CVSS score: 6.3/10. Published 2026-03-08.
- How severe is CVE-2026-3739?
- Medium severity. CVSS v3 base score is 6.3 out of 10.