Allocation of Resources Without Limits or Throttling Affecting io.netty:netty-codec-http2 package, versions [,4.1.135.Final)[4.2.0.Alpha1,4.2.15.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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- published14 Jun 2026
- disclosed12 Jun 2026
- creditAshley Tolbert,Jonathan Looney
Introduced: 12 Jun 2026
NewCVE-2026-50560 (opens in a new tab)How to fix?
Upgrade io.netty:netty-codec-http2 to version 4.1.135.Final, 4.2.15.Final or higher.
Overview
io.netty:netty-codec-http2 is a HTTP2 sub package for the netty library, an event-driven asynchronous network application framework.
Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling in the handling of the SETTINGS_MAX_HEADER_LIST_SIZE setting, when acting as a server. An attacker can cause the server to trigger exceptions during response header writing, by sending artificially small header size limits that block other clients' requests.