If Apache Tomcat 8.5.0 to 8.5.82, 9.0.0-M1 to 9.0.67, 10.0.0-M1 to 10.0.26 or 10.1.0-M1 to 10.1.0 was configured to ignore invalid HTTP headers via setting rejectIllegalHeader to false (the default for 8.5.x only), Tomcat did not reject a request containing an invalid Content-Length header making a request smuggling attack possible if Tomcat was located behind a reverse proxy that also failed to reject the request with the invalid header.
| Package (Ecosystem) | Introduced | Fixed | Limit |
|---|---|---|---|
| org.apache.tomcat.embed:tomcat-embed-core(Maven) | 8.5.0 | 8.5.83 | N/A |
| org.apache.tomcat.embed:tomcat-embed-core(Maven) | 9.0.0-M1 | 9.0.68 | N/A |
| org.apache.tomcat.embed:tomcat-embed-core(Maven) | 10.0.0-M1 | 10.0.27 | N/A |
| org.apache.tomcat.embed:tomcat-embed-core(Maven) | 10.1.0-M1 | 10.1.1 | N/A |
| org.apache.tomcat:tomcat-coyote(Maven) | 9.0.0-M1 | 9.0.68 | N/A |
| org.apache.tomcat:tomcat-coyote(Maven) | 10.0.0-M1 | 10.0.27 | N/A |
| org.apache.tomcat:tomcat-coyote(Maven) | 10.1.0-M1 | 10.1.1 | N/A |
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