CVE-2026-42222: CWE-306: Missing Authentication for Critical Function in 0xJacky nginx-ui
CVE-2026-42222 is a high-severity vulnerability in version 2. 3. 5 of 0xJacky's nginx-ui, a web user interface for the Nginx web server. It involves a missing authentication control during the initial installation phase, allowing an unauthenticated attacker to perform a bootstrap takeover via the POST /api/install endpoint. No public patches or official remediations are available at the time of publication. The vulnerability has a CVSS score of 8. 1, indicating a significant risk to confidentiality, integrity, and availability. There are no known exploits in the wild currently.
AI Analysis
Technical Summary
The vulnerability identified as CVE-2026-42222 affects nginx-ui version 2.3.5 by 0xJacky. It is classified under CWE-306 (Missing Authentication for Critical Function) and CWE-284 (Improper Access Control). The issue arises because the initial installation endpoint (/api/install) does not require authentication, allowing an attacker to take over the bootstrap process unauthenticated. This can lead to full compromise of the nginx-ui interface and potentially the underlying system. The CVSS 3.1 base score is 8.1, reflecting network attack vector, high attack complexity, no privileges required, no user interaction, and high impact on confidentiality, integrity, and availability. No patches or vendor advisories indicating fixes are currently available.
Potential Impact
Successful exploitation allows an unauthenticated attacker to take control of the nginx-ui during its initial installation window. This can lead to complete compromise of the web interface and potentially the underlying server, impacting confidentiality, integrity, and availability of the system. Given the high CVSS score and critical nature of the missing authentication, the impact is severe.
Mitigation Recommendations
At the time of this report, no official patches or fixes are available. Users should avoid deploying version 2.3.5 of nginx-ui or ensure that the initial installation endpoint is not exposed to untrusted networks. Monitoring for updates from the vendor 0xJacky is essential to apply any forthcoming patches or official mitigations. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance.
CVE-2026-42222: CWE-306: Missing Authentication for Critical Function in 0xJacky nginx-ui
Description
CVE-2026-42222 is a high-severity vulnerability in version 2. 3. 5 of 0xJacky's nginx-ui, a web user interface for the Nginx web server. It involves a missing authentication control during the initial installation phase, allowing an unauthenticated attacker to perform a bootstrap takeover via the POST /api/install endpoint. No public patches or official remediations are available at the time of publication. The vulnerability has a CVSS score of 8. 1, indicating a significant risk to confidentiality, integrity, and availability. There are no known exploits in the wild currently.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability identified as CVE-2026-42222 affects nginx-ui version 2.3.5 by 0xJacky. It is classified under CWE-306 (Missing Authentication for Critical Function) and CWE-284 (Improper Access Control). The issue arises because the initial installation endpoint (/api/install) does not require authentication, allowing an attacker to take over the bootstrap process unauthenticated. This can lead to full compromise of the nginx-ui interface and potentially the underlying system. The CVSS 3.1 base score is 8.1, reflecting network attack vector, high attack complexity, no privileges required, no user interaction, and high impact on confidentiality, integrity, and availability. No patches or vendor advisories indicating fixes are currently available.
Potential Impact
Successful exploitation allows an unauthenticated attacker to take control of the nginx-ui during its initial installation window. This can lead to complete compromise of the web interface and potentially the underlying server, impacting confidentiality, integrity, and availability of the system. Given the high CVSS score and critical nature of the missing authentication, the impact is severe.
Mitigation Recommendations
At the time of this report, no official patches or fixes are available. Users should avoid deploying version 2.3.5 of nginx-ui or ensure that the initial installation endpoint is not exposed to untrusted networks. Monitoring for updates from the vendor 0xJacky is essential to apply any forthcoming patches or official mitigations. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-04-25T05:37:12.116Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69f90348cbff5d8610482e3e
Added to database: 5/4/2026, 8:36:24 PM
Last enriched: 5/4/2026, 8:51:25 PM
Last updated: 5/4/2026, 9:38:08 PM
Views: 3
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