CVE-2026-111094 Deserialization in TeamCity
Remote attackers can execute arbitrary code on JetBrains TeamCity servers by bypassing the build messages protocol whitelist.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-111094?
CVE-2026-111094 is a high-severity unsafe deserialization vulnerability in Jetbrains Teamcity, published on 15 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
In JetBrains TeamCity before 2026.2, 2026.1.4, 2025.11.8 remote code execution via a whitelist bypass in the build messages protocol was possible
Weakness: CWE-502
Which versions are affected by CVE-2026-111094?
It affects 1 product.
Products include Jetbrains Teamcity.
How do I fix CVE-2026-111094?
No fix has been published for CVE-2026-111094 yet. Limit exposure of the affected software until one is available.
Upgrade, and only deserialise data from trusted sources or with an allow-list of types. More about Unsafe deserialization.
Is CVE-2026-111094 being exploited?
There is no known exploitation of CVE-2026-111094 in the wild and no public exploit code.
Other vulnerabilities in Jetbrains Teamcity
Sources
Also known as GHSA-x7hh-wg8w-g7jc.