CVE-2026-42586 – Netty: CRLF Injection in Netty Redis Codec Encoder

CVE ID :CVE-2026-42586

Published : May 13, 2026, 6:20 p.m. | 37 minutes ago

Description :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 (rn) 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.

Severity: 0.0 | NA

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