The defaults settings for the CORS filter provided in Apache Tomcat 9.0.0.M1 to 9.0.8, 8.5.0 to 8.5.31, 8.0.0.RC1 to 8.0.52, 7.0.41 to 7.0.8

Summary

The defaults settings for the CORS filter provided in Apache Tomcat 9.0.0.M1 to 9.0.8, 8.5.0 to 8.5.31, 8.0.0.RC1 to 8.0.52, 7.0.41 to 7.0.88 are insecure and enable 'supportsCredentials' for all origins. It is expected that users of the CORS filter will have configured it appropriately for their environment rather than using it in the default configuration. Therefore, it is expected that most users will not be impacted by this issue.

Timeline

1. May 16, 2018, 4:00 PM UTCCVE published
2. Oct 15, 2026, 5:43 PM UTCCISA SSVC assessment

   Exploitation: none · Automatable: no · Technical impact: partial

3. Oct 15, 2026, 5:44 PM UTCRecord last updated
4. Oct 22, 2026EPSS reached 10%

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

Affected versions

• Apache Software Foundation Apache Tomcat

  9.0.0.M1 to 9.0.8, 8.5.0 to 8.5.31, 8.0.0.RC1 to 8.0.52, 7.0.41 to 7.0.88

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

  From 9.0.0.M1 · fixed in 9.0.9

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

  From 8.5.0 · fixed in 8.5.32

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

  From 8.0.0RC1 · fixed in 8.0.53

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

  From 7.0.41 · fixed in 7.0.88

References 25