{"id":"CVE-2026-93563","published":"2026-09-18T11:17:21.773","lastModified":"2026-09-18T21:18:47.130","description":"A flaw was found in Netty's `SmtpResponseDecoder` component. A remote attacker, acting as a malicious or man-in-the-middle (MITM) SMTP server, could exploit this by sending a specially crafted, unbounded multi-line SMTP response without a terminator. This vulnerability leads to unbounded memory accumulation within the client's Java Virtual Machine (JVM) heap, causing an `OutOfMemoryError` and a denial of service (DoS) due to a process crash.","cvssScore":7.5,"cvssSeverity":"HIGH","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cwes":["CWE-1035"],"vendors":[],"products":[],"references":[{"url":"https://access.redhat.com/security/cve/CVE-2026-93563","tags":[]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2536976","tags":[]}],"exploitRefs":[],"hasPoc":false,"ai":null}