Allocation of Resources Without Limits or Throttling Affecting io.netty:netty-codec-http2 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
- creditChris Vest
Introduced: 8 Jun 2026
NewCVE-2026-47244 (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 due to the lack of enforcement of the advertised MAX_CONCURRENT_STREAMS setting in HTTP/2 connections in AbstractHttp2ConnectionHandlerBuilder. An attacker can exhaust server resources by opening a large number of concurrent streams over a single TCP connection, potentially leading to service disruption.