CVE-2026-86243 PUBLISHED

Apache Tomcat Native: DoS via TLS handshake

Assigner: apache
Reserved: 06.09.2026 Published: 23.09.2026 Updated: 23.09.2026

Buffer over-read vulnerability in Apache Tomcat Native during the TLS handshake permits a malicious user to trigger a DoS via a JVM crash.

This issue affects Apache Tomcat Native: from 2.0.0 through 2.0.15, from 1.3.0 through 1.3.8. Earlier, unsupported versions may also be affected.

Users are recommended to upgrade to version 1.3.9 or 2.0.16, which fix the issue.

Product Status

Vendor Apache Software Foundation
Product Apache Tomcat Native
Versions Default: unaffected
  • affected from 2.0.0 to 2.0.15 (incl.)
  • affected from 1.3.0 to 1.3.8 (incl.)

References

Problem Types

  • CWE-126 Buffer over-read CWE