CVE-2026-104474 OpenLiteSpeed before 1.9.3 Local Privilege Escalation via lsup.sh Auto-Update
Local attackers can escalate privileges to root by replacing update packages in a writable directory, allowing arbitrary code execution during auto-update.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-104474?
CVE-2026-104474 is a medium-severity vulnerability in litespeedtech openlitespeed, published on 2 Oct 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
OpenLiteSpeed before 1.9.3 contains a local privilege escalation vulnerability in admin/misc/lsup.sh that runs unverified update packages from a nobody-writable directory as root. Attackers controlling the nobody web process can replace the package in /usr/local/lsws/autoupdate/ before extraction, so its install.sh runs as root on the next update.
Weakness: CWE-367
Which versions are affected by CVE-2026-104474?
How do I fix CVE-2026-104474?
No fix has been published for CVE-2026-104474 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-104474 being exploited?
There is no known exploitation of CVE-2026-104474 in the wild and no public exploit code.
Sources
Also known as GHSA-4qqw-wg6j-834r.