Apache Tomcat APR/native Connector: Mehrere Schwachstellen
WID-SEC-2026-3559 · first 24.09.2026 · updated 26.10.2026 · CVSS 9,1
What it is about
Apache Tomcat ist ein Web-Applikationsserver für verschiedene Plattformen. Ein Angreifer kann mehrere Schwachstellen in Apache Tomcat APR/native Connector ausnutzen, um einen Denial of Service Angriff durchzuführen und um Sicherheitsvorkehrungen zu umgehen.
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
- einen Denial of Service Angriff durchzuführen
- Sicherheitsvorkehrungen zu umgehen
Am I affected?
Affected according to the BSI:
- Amazon Linux 2
- SUSE Linux
- SUSE openSUSE
- Apache Tomcat APR/native Connector <1.3.9
- Apache Tomcat APR/native Connector <2.0.16
The installed version is usually shown under “Help → About” or in the device’s admin interface.
What helps?
Update to at least:
- Apache Tomcat APR/native Connector 1.3.9
- Apache Tomcat APR/native Connector 2.0.16
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)
- GitHub Advisory Database vom 2026-09-23 github.com
- GitHub Advisory Database vom 2026-09-23 github.com
- GitHub Advisory Database vom 2026-09-23 github.com
- Fixed in Apache Tomcat Native Connector 2.0.16 / 1.3.9 vom 2026-09-23 tomcat.apache.org
- openSUSE Security Update OPENSUSE-SU-2026:21984-1 vom 2026-10-01 lists.opensuse.org
- openSUSE Security Update OPENSUSE-SU-2026:11898-1 vom 2026-10-01 lists.opensuse.org
- openSUSE Security Update OPENSUSE-SU-2026:11899-1 vom 2026-10-01 lists.opensuse.org
- SUSE Security Update SUSE-SU-2026:23985-1 vom 2026-10-05 lists.suse.com
- SUSE Security Update SUSE-SU-2026:4546-1 vom 2026-10-06 lists.suse.com
- SUSE Security Update SUSE-SU-2026:4544-1 vom 2026-10-06 lists.suse.com
- SUSE Security Update SUSE-SU-2026:4658-1 vom 2026-10-14 lists.suse.com
- Amazon Linux Security Advisory ALAS2-2026-4016 vom 2026-10-25 alas.aws.amazon.com
CVE: CVE-2026-86243, CVE-2026-86246, CVE-2026-86247
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.