Hey everyone! 
We have just released TeamSpeak 3 Server 3.13.9 to address a remaining variant of CVE-2026-4391, affecting ECC key parsing during the connection handshake.
The original fix released with 3.13.8 did not cover this additional variant, which could allow an unauthenticated remote attacker to crash the server using specially crafted input.
We strongly recommend updating to TeamSpeak 3 Server 3.13.9 as soon as possible.
The updated server version is now available for download on our Website and Docker.
– Website: TeamSpeak Downloads | Server
– Docker: TeamSpeak Systems Image
The update has also been submitted to our Official Docker Repository. Since updates there require approval process it may take some time to become available (up to 24hrs), we have temporarily published the 3.13.9 image through our TeamSpeak Systems Docker account linked above.
Please Note:
- As always, feedback is welcome here. Please note that issues unrelated to this update should be discussed in their own dedicated threads.
- We encourage you to share your suggestions for future releases in the appropriate threads within the suggestions and feedback area, rather than in the release thread. This is because update posts are typically closed after some time, and suggestions or feature requests may get overlooked.
- We reserve the right to remove any off-topic posts from this thread.
Don't miss any future Announcements