CVE-2026-93576 Netty netty-codec-smtp - Input Validation Bypass

Netty netty-codec-smtp contains an incomplete CRLF validation fix in the SMTP command-name field, letting attackers potentially bypass input validation, exploit requires crafted SMTP commands.

CVSS base score 7.5 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.27% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Input Validation Bypass
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Published
18 September 2026
Updated
15 October 2026
Weakness
CWE-93

Vendor fix

Update to the latest version with complete CRLF validation fixes.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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