---
id: CVE-2026-104474
title: >-
  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
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 …
severity: medium
cvss: 6.7
cvssVector: 'CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H'
cwe:
  - CWE-367
vendor: litespeedtech
product: openlitespeed
affected:
  - openlitespeed < 1.9.3
published: '2026-10-03'
updated: '2026-10-03'
sourceUpdated: '2026-10-03T00:16:35.413'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-104474'
references:
  - url: >-
      https://github.com/litespeedtech/openlitespeed/blob/v1.9.2/dist/admin/misc/lsup.sh#L538
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/litespeedtech/openlitespeed/commit/468523ce84388cea9ba6633c26517bc05b3e2bc1
    label: disclosure@vulncheck.com
  - url: 'https://openlitespeed.org/release-log/version-1-9-x/'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/openlitespeed-before-1.9.3-local-privilege-escalation-via-lsup-sh-auto-update
    label: disclosure@vulncheck.com
tags:
  - nvd
  - cve.org
ingestedAt: '2026-10-02T23:34:57.410Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.