CRLF Injection Affecting netty-javadoc package, versions <4.1.138-150200.4.56.1


Severity

Recommended
0.0
high
0
10

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
0.27% (18th percentile)

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  • Snyk IDSNYK-SLES157-NETTYJAVADOC-20305893
  • published30 Sept 2026
  • disclosed29 Sept 2026

Introduced: 29 Sep 2026

NewCVE-2026-93576  (opens in a new tab)
CWE-93  (opens in a new tab)

How to fix?

Upgrade SLES:15.7 netty-javadoc to version 4.1.138-150200.4.56.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream netty-javadoc package and not the netty-javadoc package as distributed by SLES. See How to fix? for SLES:15.7 relevant fixed versions and status.

A flaw was found in Netty netty-codec-smtp. The component does not properly validate Carriage Return (CR) and Line Feed (LF) characters in the SMTP command-name field. A remote attacker, if an application routes untrusted input into this field, can embed CR/LF characters to inject arbitrary SMTP commands. This can lead to SMTP command smuggling, allowing for unauthorized email relay or spoofing of sender/recipient addresses. While the impact is significant, the real-world exploitability is considered lower as applications typically do not place user-controlled data in the command-name field.

CVSS Base Scores

version 3.1