CVE details
CVE-2026-42586
Netty is an asynchronous, event-driven network application framework. Prior to 4.2.13.Final and 4.1.133.Final, the Netty Redis codec encoder (RedisEncoder) writes user-controlled string content directly to the network output buffer without validating or sanitizing CRLF (\r\n) characters. Since the Redis Serialization Protocol (RESP) uses CRLF as the command/response delimiter, an attacker who can control the content of a Redis message can inject arbitrary Redis commands or forge fake responses. This vulnerability is fixed in 4.2.13.Final and 4.1.133.Final.
Affected ports (1)
| Port | Package | Version | Status | Maintainer |
|---|---|---|---|---|
| java/netty | netty | 4.1.53_2 | unaddressed | glewis@FreeBSD.org |
Template for a VuXML entry
Range taken from the CVE record, check it before committing. make newentry in security/vuxml creates the vid.
<vuln vid="FIXME (make newentry)">
<topic>FIXME -- FIXME</topic>
<affects>
<package>
<name>netty</name>
<range><lt>4.1.133</lt></range>
</package>
</affects>
<description>
<body xmlns="http://www.w3.org/1999/xhtml">
<p>Netty is an asynchronous, event-driven network application framework.
Prior to 4.2.13.Final and 4.1.133.Final, the Netty Redis codec encoder
(RedisEncoder) writes user-controlled string content directly to the
network output buffer without validating or sanitizing CRLF (\r\n)
characters. Since the Redis Serialization Protocol (RESP) uses CRLF as
the command/response delimiter, an attacker who can control the
content of a Redis message can inject arbitrary Redis commands or
forge fake responses. This vulnerability is fixed in 4.2.13.Final and
4.1.133.Final.</p>
</body>
</description>
<references>
<cvename>CVE-2026-42586</cvename>
<url>https://nvd.nist.gov/vuln/detail/CVE-2026-42586</url>
</references>
<dates>
<discovery>2026-05-13</discovery>
<entry>2026-10-25</entry>
</dates>
</vuln>