NetSight
IP …
high7.5

CVE-2026-33871

Netty is an asynchronous, event-driven network application framework.

Impact

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.

Affected packages

EcosystemPackageAffectedFixed in
mavenio.netty:netty-codec-http2< 4.1.132.Final4.1.132.Final

Affected products

VendorProductAffected versions
NettyNetty
before 4.1.132
from 4.2.0 before 4.2.10

Weakness classification

CWE-770

References