CVE-2026-33871
Published: Mar 27, 2026
Modified: Mar 31, 2026
Description
Netty is an asynchronous, event-driven network application framework. In versions prior to 4.1.132.Final and 4.2.10.Final, a remote user can trigger a Denial of Service (DoS) against a Netty HTTP/2 server by sending a flood of `CONTINUATION` frames. The server's lack of a limit on the number of `CONTINUATION` frames, combined with a bypass of existing size-based mitigations using zero-byte frames, allows an user to cause excessive CPU consumption with minimal bandwidth, rendering the server unresponsive. Versions 4.1.132.Final and 4.2.10.Final fix the issue.
| Vendor | Product | Versions |
|---|---|---|
netty | netty | affected < 4.1.132.Finalaffected >= 4.2.0.Alpha1, < 4.2.10.Final |
Weaknesses (CWE)
References
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