CVE-2026-31386: Litespeedtech LiteSpeed Web Server

High severity, CVSS 8.6. EPSS: 2.1% chance of exploitation in the next 30 days.

OpenLiteSpeed and LSWS Enterprise provided by LiteSpeed Technologies contain an OS command injection vulnerability. An arbitrary OS command may be executed by an attacker with the administrative privilege.

Affected products

• Litespeedtech LiteSpeed Web Server: before 6.3.5 (fixed in 6.3.5)
• Litespeedtech Openlitespeed: up to and including 1.9.0

Published 2026-03-16. Last modified 2026-06-17.