0xJacky nginx-ui up to 2.3.7 GetSettings API api/settings/settings.go information disclosure

Summaryinfo

A vulnerability was found in 0xJacky nginx-ui up to 2.3.7. It has been rated as problematic. Affected by this vulnerability is an unknown functionality of the file api/settings/settings.go of the component GetSettings API Handler. Performing a manipulation results in information disclosure. This vulnerability was named CVE-2026-42223. The attack may be initiated remotely. There is no available exploit. Upgrading the affected component is advised.

Detailsinfo

A vulnerability classified as problematic has been found in 0xJacky nginx-ui up to 2.3.7. This affects an unknown function of the file api/settings/settings.go of the component GetSettings API Handler. The manipulation with an unknown input leads to a information disclosure vulnerability. CWE is classifying the issue as CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. This is going to have an impact on confidentiality. The summary by CVE is:

Nginx UI is a web user interface for the Nginx web server. Prior to version 2.3.8, the GetSettings API handler (api/settings/settings.go:24-65) serializes all settings structs to JSON and returns them to authenticated users. Many sensitive fields are tagged with protected:"true" - however, this tag is only enforced during writes (via ProtectedFill in SaveSettings) and is completely ignored during reads. This exposes 40+ protected fields including JwtSecret (enabling auth token forgery), NodeSecret (enabling cluster node impersonation), OIDC ClientSecret (enabling OAuth account takeover), and the IP whitelist configuration. This issue has been patched in version 2.3.8.

The advisory is shared at github.com. This vulnerability is uniquely identified as CVE-2026-42223 since 04/25/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1592 for this issue.

Upgrading to version 2.3.8 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-27140). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

• Web Server

Vendor

• 0xJacky

Name

• nginx-ui

Version

• 2.3.0
• 2.3.1
• 2.3.2
• 2.3.3
• 2.3.4
• 2.3.5
• 2.3.6
• 2.3.7

Website

• Product: https://github.com/0xJacky/nginx-ui/

CPE 2.3info

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CPE 2.2info

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If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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