0xJacky nginx-ui up to 2.3.2 Response Header /api/backup missing encryption

CVSS Meta Temp Score
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CTI Interest Score
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7.4$0-$5k0.00

Summaryinfo

A vulnerability marked as problematic has been reported in 0xJacky nginx-ui up to 2.3.2. This affects an unknown part of the file /api/backup of the component Response Header Handler. The manipulation leads to missing encryption. This vulnerability is documented as CVE-2026-27944. The attack can be initiated remotely. There is not any exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in 0xJacky nginx-ui up to 2.3.2 and classified as problematic. This issue affects an unknown code of the file /api/backup of the component Response Header Handler. The manipulation with an unknown input leads to a missing encryption vulnerability. Using CWE to declare the problem leads to CWE-311. The product does not encrypt sensitive or critical information before storage or transmission. Impacted is confidentiality. The summary by CVE is:

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.

The advisory is shared at github.com. The identification of this vulnerability is CVE-2026-27944 since 02/25/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1600 for this issue.

Upgrading to version 2.3.3 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at CERT Bund (WID-SEC-2026-0712). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Affected

  • Open Source nginx-ui

Productinfo

Type

Vendor

Name

Version

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.6
VulDB Meta Temp Score: 7.4

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 9.8
CNA Vector (GitHub_M): 🔒

CVSSv2info

AVACAuCIA
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💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Missing encryption
CWE: CWE-311 / CWE-310
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: nginx-ui 2.3.3

Timelineinfo

02/25/2026 CVE reserved
03/05/2026 +8 days Advisory disclosed
03/05/2026 +0 days VulDB entry created
03/14/2026 +8 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: github.com
Status: Confirmed

CVE: CVE-2026-27944 (🔒)
GCVE (CVE): GCVE-0-2026-27944
GCVE (VulDB): GCVE-100-349241
CERT Bund: WID-SEC-2026-0712 - nginx-ui: Schwachstelle ermöglicht Umgehen von Sicherheitsvorkehrungen

Entryinfo

Created: 03/05/2026 19:50
Updated: 03/14/2026 00:08
Changes: 03/05/2026 19:50 (66), 03/11/2026 21:54 (1), 03/14/2026 00:08 (7)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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