All vulnerabilities
CVE-2026-100253

In JetBrains TeamCity before 2026.2, 2026.1.4, 2025.11.8 sandbox escape leading to code execution was possible via the versioned settings Kotlin DSL

JetBrains TeamCityApplications & CMS
Open in ThreatlineRecord JSON
CVSS
8.8High
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.44%Chance of exploitation activity in the next 30 days, higher than 37% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in2026.2, 2026.1.4, 2025.11.8Fixed versionCVE List
Published30 Sep 2026Updated 1 Oct 2026CVE List

What fixes it

  • 2026.2, 2026.1.4, 2025.11.8TeamCityCVE List

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

Affected versions 1

  • TeamCityaffected: all versions before 2026.2, 2026.1.4, 2025.11.8CVE List

References 1