CVE-2026-3739 MEDIUM

CVE-2026-3739: suitenumerique messages ThreadAccess serializers.py ThreadAccessSerializer improper authentication

Vendor Suitenumerique
Product messages
Weakness CWE-287 · Improper authentication
Published March 8, 2026
Last update March 12, 2026

CVSS base score

5.3/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality
Integrity

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P

What the vulnerability does

01Description

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 improper authentication. The attack can be executed remotely. The exploit has been released to the public and may be used for attacks. Upgrading to version 0.3.0 is capable of addressing this issue. The patch is identified as d7729f4b885449f6dee3faf8b5f2a05769fb3d6e. The affected component should be upgraded.

Key dates

02Disclosure timeline

March 8, 2026 CVE published
March 12, 2026 Record updated