VDB
CVE-2026-27944
CVE-2026-27944
PUBLISHED
CVSS 9.800000190734863 CRITICAL
Nginx UI is a web user interface for the Nginx web server. Prior to version 2.3.3, the /api/backup endpoint is accessible without authentication and discloses the encryption keys required to decrypt the backup in the X-Backup-Security response header. This allows an unauthenticated attacker to download a full system backup containing sensitive data (user credentials, session tokens, SSL private keys, Nginx configurations) and decrypt it immediately. This issue has been patched in version 2.3.3.
EPSS 7.31% · 91.8th percentile
Risk Scores
CVSS v3.1
9.800000190734863
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS Score
7.31%
91.8th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| nginxui | nginx_ui | 0, 0 |
| 0xJacky | nginx-ui | < 2.3.3, < 2.3.3 |
| github.com | 0xJacky/Nginx-UI | 0, 0 |
Timeline
- Mar 5, 2026 CVE Published
- Mar 5, 2026 PoC Published
- Mar 5, 2026 PoC Published
- Mar 6, 2026 EPSS Score
- Mar 7, 2026 EPSS Score
- Mar 7, 2026 PoC Published
- Mar 8, 2026 EPSS Score
- Mar 9, 2026 PoC Published
- Mar 10, 2026 EPSS Score
- Mar 10, 2026 PoC Published
- Mar 11, 2026 EPSS Score
- Mar 12, 2026 EPSS Score
References
- https://github.com/0xJacky/nginx-ui/security/advisories/GHSA-g9w5-qffc-6762 url
- https://nvd.nist.gov/vuln/detail/CVE-2026-27944 advisory
- https://csrc.nist.gov/publications/detail/sp/800-57-part-1/rev-5/final url
- https://github.com/0xJacky/nginx-ui package
- https://owasp.org/www-project-top-ten/2017/A2_2017-Broken_Authentication url
- https://owasp.org/www-project-top-ten/2017/A3_2017-Sensitive_Data_Exposure url