SB2026093086 - Multiple vulnerabilities in nginx-ui

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Main Vulnerability Database SB2026093086

SB2026093086 - Multiple vulnerabilities in nginx-ui

Published: September 30, 2026 Updated: September 30, 2026

Security Bulletin ID SB2026093086
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 3
Exploitation vector Remote access
Highest impact Denial of service

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 3 vulnerabilities.


1) Origin validation error (CVE-ID: N/A)

CWE-ID: CWE-346 - Origin Validation Error

CVSSv4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to bypass IP allowlist enforcement.

The vulnerability exists due to origin validation error in the bundled reverse-proxy client identity handling when forwarding management API requests. A remote attacker can send requests through the bundled proxy to bypass IP allowlist enforcement.

Protected management operations still require valid credentials.


2) Origin validation error (CVE-ID: N/A)

CWE-ID: CWE-346 - Origin Validation Error

CVSSv4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to origin validation error in the bundled reverse-proxy client identity handling when processing failed login attempts. A remote attacker can submit failed login attempts from different external sources to cause a denial of service.

Existing authenticated sessions are not invalidated.


3) Resource exhaustion (CVE-ID: N/A)

CWE-ID: CWE-400 - Resource exhaustion

CVSSv4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to uncontrolled resource consumption in the node-signature authentication path when staging attacker-controlled request bodies before validating their digest and cryptographic signature. A remote attacker can send concurrent requests with syntactically valid signature metadata to cause a denial of service.

Temporary filesystem capacity, disk I/O, and request-processing resources can be consumed before the requests are rejected.


Remediation

Install update from vendor's website.

References