Missing Origin Validation in WebSockets Affecting github.com/0xjacky/nginx-ui/api package, versions <2.3.4
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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Test your applications- Snyk IDSNYK-GOLANG-GITHUBCOM0XJACKYNGINXUIAPI-16309570
- published28 Apr 2026
- disclosed20 Apr 2026
- creditUnknown
Introduced: 20 Apr 2026
CVE-2026-34403 Â (opens in a new tab)How to fix?
Upgrade github.com/0xJacky/Nginx-UI/api to version 2.3.4 or higher.
Overview
Affected versions of this package are vulnerable to Missing Origin Validation in WebSockets via missing origin validation in all WebSocket endpoints. An attacker can gain unauthorized access to authenticated WebSocket sessions by tricking a logged-in administrator into visiting a malicious webpage, which then establishes authenticated WebSocket connections using the administrator's browser cookies.