UTMStack up to 11.2.15 metadata /api/identity-providers IdentityProviderService.validateMetadataUrl server-side request forgery

Summaryinfo

A vulnerability marked as problematic has been reported in UTMStack up to 11.2.15. The affected element is the function IdentityProviderService.validateMetadataUrl of the file /api/identity-providers of the component metadata Handler. This manipulation causes server-side request forgery. This vulnerability is handled as CVE-2026-82040. The attack can be initiated remotely. There is not any exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability has been found in UTMStack up to 11.2.15 and classified as problematic. Affected by this vulnerability is the function IdentityProviderService.validateMetadataUrl of the file /api/identity-providers of the component metadata Handler. The manipulation with an unknown input leads to a server-side request forgery vulnerability. The CWE definition for the vulnerability is CWE-918. The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination. As an impact it is known to affect confidentiality. The summary by CVE is:

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.

The advisory is shared at github.com. This vulnerability is known as CVE-2026-82040 since 08/27/2026. The exploitation appears to be easy. The attack can be launched remotely. Technical details are known, but no exploit is available.

Upgrading to version 11.2.16 eliminates this vulnerability.

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Productinfo

Name

• UTMStack

Version

• 11.2.0
• 11.2.1
• 11.2.2
• 11.2.3
• 11.2.4
• 11.2.5
• 11.2.6
• 11.2.7
• 11.2.8
• 11.2.9
• 11.2.10
• 11.2.11
• 11.2.12
• 11.2.13
• 11.2.14
• 11.2.15

Website

• Product: https://github.com/UTMStack/UTMStack/

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