OpenLiteSpeed before 1.9.3 Local Privilege Escalation via lsup.sh Auto-Update
Priority LOW 25CWE-367Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- Passive
- Attack complexity
- High
- Attack requirements
- Present
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA.
Summary
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00085 0th percentileScored 2026-11-07
Fix Fixed openlitespeed (litespeedtech): 1.9.3
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| litespeedtech | openlitespeed | before 1.9.3 | 1.9.3 | Patch available | CNA |
- openlitespeed Vendorlitespeedtech Affected before 1.9.3 Fixed in 1.9.3 Patch available CNA
Remediation
- Fix · CNA openlitespeed (litespeedtech) Fixed in 1.9.3
Timeline
- 2026-10-03 Threatist record created from CVE-2026-104474
- 2026-10-03 Alias added: GHSA-4qqw-wg6j-834r
- 2026-10-04 Priority changed: MEDIUM → LOW
- 2026-10-05 CISA SSVC decision points changed
References
More litespeedtech vulnerabilities
- TI-2026-35606 LiteSpeed User-End cPanel Plugin before 2.4.5 allows privilege escalation (possibly to… KEVCVSS 4.0CRITICAL 10.0
- TI-2026-39296 LiteSpeed cPanel plugin before 2.4.8 (as distributed in LiteSpeed WHM PlugIn before… KEVCVSS 3.1HIGH 8.5
- TI-2024-29589 WordPress LiteSpeed Cache plugin < 6.5.0.1 - Unauthenticated Account Takeover via Cookie Leak vulnerability CVSS 3.1CRITICAL 9.8
- TI-2024-18601 WordPress LiteSpeed Cache plugin <= 6.3.0.1 - Unauthenticated Privilege Escalation vulnerability CVSS 3.1CRITICAL 9.8
- TI-2022-00030 Authenticated Remote Code Execution in OpenLiteSpeed Web Server CVSS 3.1HIGH 8.8
- TI-2026-83023 Client certificate bypass over HTTP/3 in OpenLiteSpeed CVSS 4.0HIGH 8.2
Sources
- CVE-2026-104474 · CVE Program
- CVE-2026-104474 · NVD
- FIRST EPSS
- GHSA-4qqw-wg6j-834r · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences