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Apache Tomcat: Mehrere Schwachstellen

WID-SEC-2026-4066 · first 21.10.2026 · updated 21.10.2026 · CVSS 9,8

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What it is about

Apache Tomcat ist ein Web-Applikationsserver für verschiedene Plattformen. Ein entfernter Angreifer kann mehrere Schwachstellen in Apache Tomcat ausnutzen, um Sicherheitsvorkehrungen zu umgehen, Informationen offenzulegen oder einen Denial of Service Angriff durchzuführen.

Under what conditions?

Over the network.

What can happen in the worst case

An attacker could use the vulnerability to

  • Sicherheitsvorkehrungen zu umgehen
  • Informationen offenzulegen oder einen Denial of Service Angriff durchzuführen

Am I affected?

Affected according to the BSI:

  • Apache Tomcat <11.0.27
  • Apache Tomcat <10.1.61
  • Apache Tomcat <9.0.123

The installed version is usually shown under “Help → About” or in the device’s admin interface.

What helps?

Update to at least:

  • Apache Tomcat 11.0.27
  • Apache Tomcat 10.1.61
  • Apache Tomcat 9.0.123

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

CVE: CVE-2026-101296, CVE-2026-101356, CVE-2026-103119, CVE-2026-74048, CVE-2026-74049, CVE-2026-80353, CVE-2026-88041, CVE-2026-93446

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.

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