cvedb.io
CVE-2026-55833
HIGH · CVSS 7.5
EPSS exploitation probability: 0%
Published 2026-07-21T00:17:35.537 · Last modified 2026-07-21T00:17:35.537

Summary

Netty is a network application framework for development of protocol servers and clients. Prior to 4.1.136.Final and 4.2.16.Final, Netty SPDY header decoding continues inflating zlib-compressed header blocks after the raw header parser has exceeded `maxHeaderSize` and marked the frame truncated in `SpdyFrameCodec`, allowing a remote peer to send a small compressed `HEADERS` block that expands into much larger raw header data and causes compression-amplified CPU and allocation churn. This issue is fixed in versions 4.1.136.Final and 4.2.16.Final.

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References

This product uses data from the NVD API but is not endorsed or certified by the NVD. Informational only; not professional security advice.