Incomplete List of Disallowed Inputs in TeamCity - CVE-2026-106218
Published: October 7, 2026
Vulnerability identifier: #VU153917
CSH Severity: Low
CVSS v4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-106218
CWE-ID: CWE-184
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to execute arbitrary code on the server.
The vulnerability exists due to incomplete filtering of dangerous inputs in the Kotlin DSL sandbox when executing Kotlin DSL code. A local user can escape the sandbox to execute arbitrary code on the server.
Affected software
TeamCity
How to mitigate CVE-2026-106218
Install security update from vendor's website.
TeamCity - addressed in versions 2025.11.7, 2026.1.3