Allocation of Resources Without Limits or Throttling Affecting io.netty:netty-codec-http package, versions [4.1.0.Final,4.1.136.Final)[4.2.0.Final,4.2.16.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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- published22 Jul 2026
- disclosed21 Jul 2026
- creditUnknown
Introduced: 21 Jul 2026
NewCVE-2026-56745 (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 in the SpdyHttpDecoder. An attacker can cause native memory exhaustion by sending a client-initiated SYN_STREAM frame with FLAG_FIN=0 followed by a RST_STREAM frame or by exceeding the maximum content length, which leads to unreleased pooled ByteBuf allocations.