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netty

Netty HTTP/3 codec versions prior to 4.2.15.Final have a vulnerability where the default Http3ConnectionHandler configuration does not enforce a maximum header size limit. This allows a malicious peer to send an excessive number of headers, potentially causing memory exhaustion and a Denial of Service via an OutOfMemoryError. The issue is fixed in version 4.2.15.Final.

The Netty network application framework's HTTP/3 codec, specifically the Http3ConnectionHandler, lacks an enforced maximum header size limit by default in versions before 4.2.15.Final. If the peer does not specify the HTTP3_SETTINGS_MAX_FIELD_SECTION_SIZE setting, the implementation defaults to an unbounded header size. This insecure default can be exploited by a malicious client or server to send an extremely large number of headers, leading to memory exhaustion and crashing the application with an OutOfMemoryError. The vulnerability is addressed in Netty version 4.2.15.Final with a patch that enforces a maximum header size limit.

Netty HTTP/3 codec versions prior to 4.2.15.Final have a vulnerability where the default Http3ConnectionHandler configuration does not enforce a maximum header size limit. This allows a malicious peer to send an excessive number of headers, potentially causing memory exhaustion and a Denial of Servi

Prior to version 4.2.15.Final, the default configuration of the Http3ConnectionHandler in the Netty HTTP/3 codec lacks an enforced maximum header… (CVE-2026-44892)

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