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Apache Security Update

The Apache Software Foundation has released security advisories to address multiple vulnerabilities in ApacheTomcat CVE-2020-13934 and CVE-2020-13935. An attacker could exploit these vulnerabilities to cause a denial-of-service condition.

Versions Affected

  • Apache Tomcat 10.0.0-M1 to 10.0.0-M6
  • Apache Tomcat 9.0.0.M5 to 9.0.36
  • Apache Tomcat 8.5.1 to 8.5.56


An h2c direct connection did not release the HTTP/1.1 processor after the upgrade to HTTP/2. If a sufficient number of such requests were made, an OutOfMemoryException could occur leading to a denial of service.


  • Upgrade to Apache Tomcat 10.0.0-M7 or later
  • Upgrade to Apache Tomcat 9.0.37 or later
  • Upgrade to Apache Tomcat 8.5.57 or later