CVE-2026-55833highCWE-400

CVE-2026-55833: fallo de gravedad alta en netty

Netty SPDY zlib header block continues decoded expansion after maxHeaderSize truncation

Publicada el · Actualizada el

Seguir esta CVE+ Monitorear netty+ Monitorear netty

Aviso por correo cuando entre en el KEV, tenga PoC pública o suba de nota.

21Vexday Risk Score

Sin señal de explotación. Ningún artefacto público de explotación conocido hasta ahora.

ssvc Trackcvss 7.5epss 0.7%
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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Productos afectados
netty · netty
CVEs relacionadas — netty

En el mismo producto, de las más peligrosas a las menos.

CVE-2021-21409MEDIUMPossible request smuggling in HTTP/2 due missing validation of content-lengthEPSS 4.9%CVE-2021-43797MEDIUMHTTP fails to validate against control chars in header names which may lead to HTTP request smugglingEPSS 2.9%CVE-2023-34462MEDIUMnetty-handler SniHandler 16MB allocationEPSS 2.5%CVE-2025-24970HIGHSslHandler doesn't correctly validate packets which can lead to native crash when using native SSLEngineEPSS 2.2%CVE-2021-21290MEDIUMLocal Information Disclosure Vulnerability in Netty on Unix-Like systems due temporary filesEPSS 1.8%CVE-2022-41881MEDIUMCVE-2022-41881EPSS 1.6%