Vulnerability · Published Oct 2, 2026 · Assigned by VulnCheck
CVE-2026-104474OpenLiteSpeed before 1.9.3 Local Privilege Escalation via lsup.sh Auto-Update
Medium 6.7
In plain English
A medium-severity security flaw in openlitespeed from litespeedtech. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 0% of all known vulnerabilities).
Severity (CVSS 3.1)6.7Medium
Exploit odds (30 days)<0.1%top 99.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| litespeedtech | openlitespeed | 0 – before 1.9.3 |
Weakness: CWE-367 · Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H
References
- OpenLiteSpeed Version 1.9.x Release Log vendor-advisory
- https://github.com/litespeedtech/openlitespeed/commit/468523ce84388cea9ba6633c26517bc05b3e2bc1 patch
- https://github.com/litespeedtech/openlitespeed/blob/v1.9.2/dist/admin/misc/lsup.sh#L538 technical-description
- VulnCheck Advisory: OpenLiteSpeed before 1.9.3 Local Privilege Escalation via lsup.sh Auto-Update third-party-advisory