CVE-2026-55833
7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| netty | netty | >= 4.2.0.Final, < 4.2.16.Final | affected |
| netty | netty | >= 4.1.0.Final, < 4.1.136.Final | affected |
Weaknesses
- CWE-400: CWE-400: Uncontrolled Resource Consumption
References
- https://github.com/netty/netty/security/advisories/GHSA-mvh2-crg5-v77c
- https://github.com/netty/netty/commit/5b68c61f37aa4a3045cba624cbea239655c9003b
- https://github.com/netty/netty/commit/bb2ff68a1fb71cb4b0eb9a9e17b66c52aff680c6
- https://github.com/netty/netty/releases/tag/netty-4.1.136.Final
- https://github.com/netty/netty/releases/tag/netty-4.2.16.Final
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