What is CVE-2026-27944?

CVE-2026-27944 is a critical-severity vulnerability in 0xjacky Nginx-ui, classified under Missing Encryption of Sensitive Data. CVSS score: 9.8/10. Published 2026-03-05.

How severe is CVE-2026-27944?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Is CVE-2026-27944 known to be exploited?

6 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Auth bypass in 0xjacky Nginx-ui

CVE-2026-27944

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 resp…

EPSS: 0.073 (91.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

0xjacky Nginx-ui — versions < 2.3.3

Weakness classification (CWE)

Public proof-of-concept exploits

References

https://github.com/0xJacky/nginx-ui/security/advisories/GHSA-g9w5-qffc-6762 (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2026-27944?: CVE-2026-27944 is a critical-severity vulnerability in 0xjacky Nginx-ui, classified under Missing Encryption of Sensitive Data. CVSS score: 9.8/10. Published 2026-03-05.
How severe is CVE-2026-27944?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2026-27944 known to be exploited?: 6 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.