SecuriTricks - CVE-2026-42586

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.

Product(s) Impacted

Vendor	Product	Versions
Netty	Netty	<4.2.13.Final, <4.1.133.Final

Weaknesses

Common security weaknesses mapped to this vulnerability.

CWE-93

Improper Neutralization of CRLF Sequences ('CRLF Injection')

The product uses CRLF (carriage return line feeds) as a special element, e.g. to separate lines or records, but it does not neutralize or incorrectly neutralizes CRLF sequences from inputs.

*CPE(s)

Affected systems and software identified for this CVE.

Type	Vendor	Product	Version	Update	Edition	Language	Software Edition	Target Software	Target Hardware	Other Information
a	netty	netty	<4.2.13.Final	/	/	/	/	/	/	/
a	netty	netty	<4.1.133.Final	/	/	/	/	/	/	/

References

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

CVSS Score

6.8 / 10

CVSS Data - 3.1

Attack Vector: LOCAL
Attack Complexity: LOW
Privileges Required: NONE
Scope: UNCHANGED
Confidentiality Impact: LOW
Integrity Impact: HIGH
Availability Impact: NONE

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

View Vector String

Timeline

Published: May 13, 2026, 7:17 p.m.
Last Modified: May 14, 2026, 7:16 p.m.

Status : Undergoing Analysis

CVE has been recently published to the CVE List and has been received by the NVD.

More info

Source

[email protected]

CVE-2026-42586