How broadly exploitable is this vulnerability?

Any attacker who can reach the Nginx UI `/api/backup` endpoint over the network can exploit the issue without authentication. If the UI is exposed to the internet or an untrusted internal segment, the exposure is effectively global.

What level of access does an attacker need?

Only network access to the Nginx UI instance is required. No valid user account, session, or prior foothold in the system is necessary to trigger the vulnerable backup endpoint.

What is the safest general fix pattern?

Treat backup creation and retrieval as privileged administrative operations that always require authentication and authorization, and ensure that cryptographic keys are never transmitted with the encrypted data itself. Keys should be isolated in secure storage and not exposed through API responses.

Severity:

CRITICAL RISK

(9.8)

Missing Authentication & Key Disclosure (CWE-306, CWE-311) in Nginx UI Backup API

CVE-2026-27944

Published:

Mar 5, 2026

Status:

Undergoing Analysis

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

NDV

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CRITICAL

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Vulnerability Type

Category:

Improper Authentication and Sensitive Data Exposure

CWE:

CWE-306;CWE-311

Impact:

Unauthenticated Access to Encrypted Backups and Sensitive Data Exposure

Severity:

CRITICAL RISK

(9.8)

CVSS Version:

3.1

Vulnerability Type

Category:

Improper Authentication and Sensitive Data Exposure

CWE:

CWE-306;CWE-311

Impact:

Unauthenticated Access to Encrypted Backups and Sensitive Data Exposure

Severity:

CRITICAL RISK

(9.8)

CVSS Version:

3.1

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Missing Authentication & Key Disclosure (CWE-306, CWE-311) in Nginx UI Backup API

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

Recent Vulnerabilities

CRITICAL RISK

CRITICAL

(9.9)

Command Injection in MCP Stdio Configuration Validation (CWE-78) in WeKnora

CRITICAL RISK

CRITICAL

(9.9)

SQL Injection via PostgreSQL Array/Row Expressions (CWE-89) in WeKnora Query Engine

Vulnerability Type

Vulnerability Type

Vulnerability Type

Catch This CVE While Code Is Being Written

Ship clean & secure code faster

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