A regression in the fix for bug 66512 in Apache Tomcat 11.0.0-M5, 10.1.8, 9.0.74 and 8.5.88 meant that, if a response did not include any HTTP headers no AJP SEND_HEADERS messare woudl be sent for the response which in turn meant that at least one AJP proxy (mod_proxy_ajp) would use the response headers from the previous request leading to an information leak.
| Package (Ecosystem) | Introduced | Fixed | Limit |
|---|---|---|---|
| org.apache.tomcat.embed:tomcat-embed-core(Maven) | 11.0.0-M5 | 11.0.0-M6 | N/A |
| org.apache.tomcat.embed:tomcat-embed-core(Maven) | 10.1.8 | 10.1.9 | N/A |
| org.apache.tomcat.embed:tomcat-embed-core(Maven) | 9.0.74 | 9.0.75 | N/A |
| org.apache.tomcat:tomcat-coyote(Maven) | 8.5.88 | 8.5.89 | N/A |
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