Vulnerability 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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.002
EPSS Ranking 12.1%
CVSS Severity
CVSS v3 Score 6.8
References
Products affected by CVE-2026-42586
-
cpe:2.3:a:netty:netty:4.2.0
-
cpe:2.3:a:netty:netty:4.2.1
-
cpe:2.3:a:netty:netty:4.2.10
-
cpe:2.3:a:netty:netty:4.2.11
-
cpe:2.3:a:netty:netty:4.2.12
-
cpe:2.3:a:netty:netty:4.2.2
-
cpe:2.3:a:netty:netty:4.2.3
-
cpe:2.3:a:netty:netty:4.2.4
-
cpe:2.3:a:netty:netty:4.2.5
-
cpe:2.3:a:netty:netty:4.2.6
-
cpe:2.3:a:netty:netty:4.2.7
-
cpe:2.3:a:netty:netty:4.2.8
-
cpe:2.3:a:netty:netty:4.2.9