CVE-2026-104474

OpenLiteSpeed before 1.9.3 Local Privilege Escalation via lsup.sh Auto-Update

5.4 Medium

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.

Attack profile

How easy it is to exploit

Attack vector: Local
Complexity: High
Privileges needed: Low
User interaction: Passive

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: High

Exploit likelihood

0.08%Unchanged since Oct 3, 2026

What each source reports

CVE List Score used 5.4

OpenLiteSpeed before 1.9.3 Local Privilege Escalation via lsup.sh Auto-Update

Record: CVE-2026-104474
CVSS 4.0: 5.4 MediumCVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CVSS 3.1: 6.7 MediumCVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H
Weakness: CWE-367
Updated: 2026-11-02

EUVDEUVD-2026-91850 5.4

Record: EUVD-2026-91850
CVSS 4.0: 5.4 MediumCVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Updated: 2026-11-02

GitHub AdvisoriesGHSA-4qqw-wg6j-834r 5.4

OpenLiteSpeed before 1.9.3 contains a local privilege escalation vulnerability in admin/misc/lsup...

Record: GHSA-4qqw-wg6j-834r
CVSS 4.0: 5.4 MediumCVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1: 6.7 MediumCVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H
Weakness: CWE-367
Updated: 2026-11-02

NVD 5.4

Record: CVE-2026-104474
CVSS 4.0: 5.4 MediumCVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1: 6.7 MediumCVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H
Weakness: CWE-367
Updated: 2026-11-02

OSV 5.4

OpenLiteSpeed before 1.9.3 Local Privilege Escalation via lsup.sh Auto-Update

Record: CVE-2026-104474
CVSS 4.0: 5.4 MediumCVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Weakness: CWE-367
Updated: 2026-11-02

Affected products

History

History
Recorded	Changed	Sources
Nov 2, 2026	first indexed	CVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-104474 is a medium vulnerability (CVSS 5.4) in Litespeed Technologies Openlitespeed, published October 2, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.08%, the 0th percentile. No source names a fixed version.