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.

CVSS 3.1

7.1CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

EPSS

0.2% chance of exploitation in the next 30 days; higher than 12% of CVEs (scores of 2026-10-25)

CWE

CWE-93

Published

2026-05-13

Modified

2026-10-26

Record from

the NVD, synced 2026-10-26

Affected

• netty:netty

Packages (OSV)

References

• https://github.com/netty/netty/security/advisories/GHSA-rgrr-p7gp-5xj7
• https://github.com/netty/netty/security/advisories/GHSA-rgrr-p7gp-5xj7

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