CVE-2026-50020: falha de média gravidade em netty
Netty's HttpObjectDecoder skips arbitrary initial control characters when only initial CRLF characters are permitted
Publicada em
Aviso por e-mail quando ela entrar no KEV, ganhar PoC pública ou subir de nota.
13Vexday Risk Score
Sem sinal de exploração. Nenhum artefato público de exploração conhecido até agora.
ssvc Trackcvss 5.3epss 0.2%
Netty is a network application framework for development of protocol servers and clients. Prior to versions 4.1.135.Final and 4.2.15.Final, before reading the first request-line, `HttpObjectDecoder` skips every byte for which `Character.isISOControl(b)` is `true` (0x00–0x1F and 0x7F) as well as all whitespace. RFC 9112 §2.2 only asks servers to ignore empty CRLF lines preceding the request-line — a carefully scoped robustness allowance intended to handle HTTP/1.0 POST workarounds. Silently absorbing NUL bytes, SOH, STX, and other non-CRLF control characters goes significantly beyond this, and can be exploited for request-boundary confusion in pipelined or multiplexed transports where a front-end component treats those bytes differently. Versions 4.1.135.Final and 4.2.15.Final patch the issue.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Produtos afetados
netty · nettyCVEs relacionadas — netty
No mesmo produto, das mais perigosas para as 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%