{"id":"CVE-2026-93576","published":"2026-09-18T15:17:21.167","lastModified":"2026-09-18T21:18:48.540","description":"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.","cvssScore":7.5,"cvssSeverity":"HIGH","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","cwes":["CWE-93"],"vendors":[],"products":[],"references":[{"url":"https://access.redhat.com/security/cve/CVE-2026-93576","tags":[]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2536968","tags":[]}],"exploitRefs":[],"hasPoc":false,"ai":null}