JetBrains TeamCity: Mehrere Schwachstellen
WID-SEC-2026-3687 · first 01.10.2026 · updated 01.10.2026 · CVSS 8,8
What it is about
TeamCity ist ein Continuous Integration und Deployment Tool für Entwickler und DevOps Ingenieure. Ein Angreifer kann mehrere Schwachstellen in JetBrains TeamCity ausnutzen, um beliebigen Programmcode auszuführen, Sicherheitsmaßnahmen zu umgehen und Administratorrechte zu erlangen.
Under what conditions?
The BSI does not name any particular preconditions. Exploitable remotely according to the BSI.
What can happen in the worst case
An attacker could use the vulnerability to
- beliebigen Programmcode auszuführen
- Sicherheitsmaßnahmen zu umgehen
- Administratorrechte zu erlangen
Am I affected?
Affected according to the BSI:
- JetBrains TeamCity <2026.2
- JetBrains TeamCity <2026.1.4
- JetBrains TeamCity <2025.11.8
The installed version is usually shown under “Help → About” or in the device’s admin interface.
What helps?
Update to at least:
- JetBrains TeamCity 2026.2
- JetBrains TeamCity 2026.1.4
- JetBrains TeamCity 2025.11.8
Is the vulnerability already being exploited?
None of the CVEs is in the CISA catalogue of exploited vulnerabilities. That does not mean there are no attacks, only that none are documented.
Information and sources
- Original BSI advisory (WID)
- JetBrains Fixed security issues vom 2026-09-30 www.jetbrains.com
- National Vulnerability Database CVE-2026-100253 vom 2026-09-30 nvd.nist.gov
- National Vulnerability Database CVE-2026-100254 vom 2026-09-30 nvd.nist.gov
- National Vulnerability Database CVE-2026-100255 vom 2026-09-30 nvd.nist.gov
CVE: CVE-2026-100253, CVE-2026-100254, CVE-2026-100255
Source: BSI warning and information service (CERT-Bund); CISA. The assessment of the conditions is my reading of the BSI text; the external pages are in their original language.