CVE-2026-3739 suitenumerique messages ThreadAccess serializers.py ThreadAccessSerializer improper authentication
Improper authentication in ThreadAccessSerializer allows remote attackers to bypass access controls and access thread data.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-3739?
CVE-2026-3739 is a medium-severity authentication bypass vulnerability in suitenumerique messages, published on 8 Mar 2026. Any signed-in user can exploit it over the network, with no action from the victim.
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.
Weakness: CWE-287
Which versions are affected by CVE-2026-3739?
How do I fix CVE-2026-3739?
No fix has been published for CVE-2026-3739 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-3739 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-3739 exists.
Sources
Also known as GHSA-632x-p8x5-j45w, GHSA-7476-6crq-4cw9.