CVE-1999-0393: Eric Allman Sendmail

Medium severity, CVSS 5.0. EPSS: 2.4% chance of exploitation in the next 30 days.

Remote attackers can cause a denial of service in Sendmail 8.8.x and 8.9.2 by sending messages with a large number of headers.

Affected products

• Eric Allman Sendmail: version 8.8 only; version 8.9.2 only

Published 1999-01-01. Last modified 2026-06-16.