Allocation of Resources Without Limits or Throttling Affecting io.netty:netty-handler package, versions [,4.1.135.Final)[4.2.0.Final,4.2.15.Final)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published9 Jun 2026
- disclosed8 Jun 2026
- creditUnknown
Introduced: 8 Jun 2026
NewCVE-2026-45416 (opens in a new tab)How to fix?
Upgrade io.netty:netty-handler to version 4.1.135.Final, 4.2.15.Final or higher.
Overview
io.netty:netty-handler is a library that provides an asynchronous event-driven network application framework and tools for rapid development of maintainable high performance and high scalability protocol servers and clients. In other words, Netty is a NIO client server framework which enables quick and easy development of network applications such as protocol servers and clients. It greatly simplifies and streamlines network programming such as TCP and UDP socket server.
Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling in the SslClientHelloHandler.decode() function. An attacker can cause excessive memory allocation by sending a specially crafted TLS handshake with a large handshake length value, leading to resource exhaustion and potential denial of service.