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Medium severity · published Oct 2, 2026
CVE-2026-104474
OpenLiteSpeed before 1.9.3 Local Privilege Escalation via lsup.sh Auto-Update
6.7
CVSS
0.1%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
High
Privileges
Low
User interaction
Required
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.1% · higher than 0% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
OP
openlitespeed · litespeedtech
before 1.9.3 · source: vendor
Affected product
OP
openlitespeed
litespeedtech
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-104474
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-104474
vendor-advisory
https://openlitespeed.org/release-log/version-1-9-x/
patch
https://github.com/litespeedtech/openlitespeed/commit/468523ce84388cea9ba6633c26517bc05b3e2bc1
technical-description
https://github.com/litespeedtech/openlitespeed/blob/v1.9.2/dist/admin/misc/lsup.sh#L538
third-party-advisory
https://www.vulncheck.com/advisories/openlitespeed-before-1.9.3-local-privilege-escalation-via-lsup-sh-auto-update
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