Apache Tomcat: FileUpload large number of parts with headers DoS

Summary

Allocation of Resources Without Limits or Throttling vulnerability in Apache Tomcat. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.7, from 10.1.0-M1 through 10.1.41, from 9.0.0.M1 through 9.0.105. The following versions were EOL at the time the CVE was created but are known to be affected: 8.5.0 though 8.5.100. Other, older, EOL versions may also be affected. Users are recommended to upgrade to version 11.0.8, 10.1.42 or 9.0.106, which fix the issue.

Timeline

1. Jun 16, 2025, 2:13 PM UTCCVE published
2. Jun 17, 2025, 6:20 PM UTCCISA SSVC assessment

   Exploitation: none · Automatable: yes · Technical impact: partial

3. Nov 3, 2025, 8:05 PM UTCRecord last updated
4. Oct 28, 2026EPSS reached 10%

   FIRST estimates at least a 10% chance of exploitation in the next 30 days

Affected versions

• Apache Software Foundation Apache Tomcat

  From 11.0.0-M1 · through 11.0.7; From 10.1.0-M1 · through 10.1.41; From 9.0.0.M1 · through 9.0.105; From 8.5.0 · through 8.5.100

• org.apache.tomcat:tomcat-catalinaMaven

  From 11.0.0-M1 · fixed in 11.0.8

• org.apache.tomcat:tomcat-catalinaMaven

  From 10.1.0-M1 · fixed in 10.1.42

• org.apache.tomcat:tomcat-catalinaMaven

  From 9.0.0.M1 · fixed in 9.0.106

• org.apache.tomcat.embed:tomcat-embed-coreMaven

  From 11.0.0-M1 · fixed in 11.0.8

• org.apache.tomcat.embed:tomcat-embed-coreMaven

  From 10.1.0-M1 · fixed in 10.1.42

• org.apache.tomcat.embed:tomcat-embed-coreMaven

  From 9.0.0.M1 · fixed in 9.0.106

• org.apache.tomcat:tomcat-catalinaMaven

  From 8.5.0 · through 8.5.100

• org.apache.tomcat.embed:tomcat-embed-coreMaven

  From 8.5.0 · through 8.5.100

References 2