Is CVE-2026-42586 actively exploited?

No active exploitation of CVE-2026-42586 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-42586 be exploited remotely?

No. CVE-2026-42586 requires local access to exploit.

What is the CVSS score of CVE-2026-42586?

CVE-2026-42586 has a CVSS score of 7.1 (HIGH).

HOME VULNERABILITIESCVE-2026-42586

HIGH

CVE-2026-42586

CWE-93Published: May 13, 2026· Updated: May 18, 2026

7.1

CVSS v3.1

EPSS:0.02%probability of exploitation in 30 daysPercentile:5.0th

Official 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 (\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.

NVD Source

Technical Analysis

CVE-2026-42586 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), with a CVSS base score of 7.1.