What’s Vulnerable › Vulnerabilities

CVE-2026-82040: UTMStack < 11.2.16 SSRF via IdentityProviderService

• Severity: medium (CVSS 5.0 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-02 · updated 2026-10-06
• Weakness: CWE-918

Description

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.

Affected products

• UTMStack: before 11.2.16 — fixed in 11.2.16

How to fix

Upgrade to a fixed version: UTMStack 11.2.16. Check the vendor advisory for mitigations.

References

• https://github.com/UTMStack/UTMStack/releases/tag/v11.2.16
• https://github.com/utmstack/UTMStack/commit/4e7a727c3b8d8e2ad020d3b4f982a6d085dbecdd
• https://www.vulncheck.com/advisories/utmstack-ssrf-via-identityproviderservice

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