The HTTP/2 protocol allows a denial of service (server resource consumption) because request cancellation can reset many streams quickly, as exploited in the wild in August through October 2023.

Jetty before 4.2.27, 5.1 before 5.1.12, 6.0 before 6.0.2, and 6.1 before 6.1.0pre3 generates predictable session identifiers using java.util.random, which makes it easier for remote attackers to guess a session identifier through brute force attacks, bypass authentication requirements, and possibly conduct cross-site request forgery attacks.

HttpRequest.java in Jetty HTTP Server before 4.2.19 allows remote attackers to cause denial of service (memory usage and application crash) via HTTP requests with a large Content-Length.

Unspecified vulnerability in Jetty HTTP Server, as used in (1) IBM Trading Partner Interchange before 4.2.4, (2) CA Unicenter Web Services Distributed Management (WSDM) before 3.11, and possibly other products, allows remote attackers to read arbitrary files via a .. (dot dot) in the URL.

Directory traversal vulnerability in the CGIServlet for Jetty HTTP server before 4.1.0 allows remote attackers to execute arbitrary commands via ..\ (dot-dot backslash) sequences in an HTTP request to the cgi-bin directory.