Missing Authentication for Critical Function Affecting github.com/0xjacky/nginx-ui/api/system package, versions >=2.0.0-beta.1 <2.3.8
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Start learning- Snyk IDSNYK-GOLANG-GITHUBCOM0XJACKYNGINXUIAPISYSTEM-16419393
- published5 May 2026
- disclosed4 May 2026
- creditR1ZZG0D
Introduced: 4 May 2026
CVE-2026-42221 Â (opens in a new tab)How to fix?
Upgrade github.com/0xJacky/Nginx-UI/api/system to version 2.3.8 or higher.
Overview
github.com/0xJacky/Nginx-UI/api/system is a yet another Nginx Web UI
Affected versions of this package are vulnerable to Missing Authentication for Critical Function via the api/install endpoint during the initial setup process. An attacker can gain unauthorized administrative access by sending a crafted installation request before the legitimate operator completes the setup, resulting in permanent control over the instance.