CVSS 3.1
9.8 criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HCVE-2026-27944
Critical (9.8) in nginxui nginx ui. EPSS 23% chance of exploitation in the next 30 days. Fixed in github.com/0xJacky/Nginx-UI 2.3.3.
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.
Severity
- EPSS
- 23% chance of exploitation in the next 30 days; higher than 97% of CVEs (scores of 2026-10-31)
- CWEs
- CWE-306, CWE-311
- Published
- Modified
- Record from
- the NVD, synced
Affected
- nginxui:nginx_ui
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-g9w5-qffc-6762 | Go | github.com/0xJacky/Nginx-UI | <2.3.3 | 2.3.3 |
| GO-2026-4614 | Go | github.com/0xJacky/Nginx-UI | all versions | no fix published |