CVE-2026-104474
OpenLiteSpeed before 1.9.3 Local Privilege Escalation via lsup.sh Auto-Update
- State
- Published
- Severity
- 5.4 Medium
- Published
- Oct 2, 2026
- Updated
- Oct 5, 2026
- Reserved
- Oct 2, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 5.4 Medium | CVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 6.7 Medium | CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H | VulnCheck |
Weaknesses
- CWE-367 Time-of-check Time-of-use (TOCTOU) Race Condition
Affected Products
| Product | Versions |
|---|---|
openlitespeedlitespeedtech |
|
References
- OpenLiteSpeed Version 1.9.x Release Logvendor-advisory
- https://github.com/litespeedtech/openlitespeed/commit/468523ce84388cea9ba6633c26517bc05b3e2bc1patch
- https://github.com/litespeedtech/openlitespeed/blob/v1.9.2/dist/admin/misc/lsup.sh#L538technical-description
- VulnCheck Advisory: OpenLiteSpeed before 1.9.3 Local Privilege Escalation via lsup.sh Auto-Updatethird-party-advisory
Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.