Allocation of Resources Without Limits or Throttling Affecting io.netty:netty-codec-http package, versions [,4.1.136.Final)[4.2.0.Final,4.2.16.Final)
Threat Intelligence
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Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
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- published23 Jul 2026
- disclosed22 Jul 2026
- creditAlexender676
Introduced: 22 Jul 2026
NewCVE-2026-55831 (opens in a new tab)How to fix?
Upgrade io.netty:netty-codec-http to version 4.1.136.Final, 4.2.16.Final or higher.
Overview
io.netty:netty-codec-http is a network application framework for rapid development of maintainable high performance protocol servers & clients.
Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling through the processing of SPDY SETTINGS frames in the SpdyFrameCodec.decode function. An attacker can cause excessive memory allocation and CPU consumption by sending a specially crafted SETTINGS frame with a large number of unique setting IDs, leading to resource exhaustion on the target system.