Is CVE-2026-3739 actively exploited?

No active exploitation of CVE-2026-3739 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-3739 be exploited remotely?

Yes. CVE-2026-3739 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-3739?

CVE-2026-3739 has a CVSS score of 6.3 (MEDIUM).

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MEDIUM

CVE-2026-3739

CWE-287Published: March 8, 2026· Updated: Mar 9, 2026

6.3

CVSS v3.1

EPSS:0.10%probability of exploitation in 30 daysPercentile:26.3th

Official Description

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.

NVD Source

Technical Analysis

CVE-2026-3739 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

From a weakness classification perspective (CWE-287): Authentication bypass vulnerabilities allow attackers to access protected resources without valid credentials.