---
id: CVE-2026-82040
title: >-
  UTMStack before 11.2.16 contains a server-side request forgery vulnerability
  in IdentityProviderService.validateMetadataUrl() that allows authenticated
  attackers to make the server send requests to arbitrary internal or cloud
  metadata ho…
summary: >-
  UTMStack before 11.2.16 contains a server-side request forgery vulnerability
  in IdentityProviderService.validateMetadataUrl() that allows authenticated
  attackers to make the server send requests to arbitrary internal or cloud
  metadata ho…
severity: medium
cvss: 5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N'
cwe:
  - CWE-918
vendor: UTMStack
product: UTMStack
affected:
  - UTMStack < 11.2.16
published: '2026-10-02'
updated: '2026-10-02'
sourceUpdated: '2026-10-02T20:17:04.587'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-82040'
references:
  - url: 'https://github.com/UTMStack/UTMStack/releases/tag/v11.2.16'
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/utmstack/UTMStack/commit/4e7a727c3b8d8e2ad020d3b4f982a6d085dbecdd
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/utmstack-ssrf-via-identityproviderservice
    label: disclosure@vulncheck.com
tags:
  - nvd
  - cve.org
ingestedAt: '2026-10-02T22:33:09.845Z'
---

## Overview

UTMStack before 11.2.16 contains a server-side request forgery vulnerability in IdentityProviderService.validateMetadataUrl() that allows authenticated attackers to make the server send requests to arbitrary internal or cloud metadata hosts by supplying a malicious metadata URL to the identity-providers endpoint. Attackers can exploit the POST/PUT /api/identity-providers endpoint with no validation of target host, IP, or scheme to perform internal network port scanning and access cloud instance-metadata services.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.