Vulnerability · Published Oct 2, 2026 · Assigned by VulnCheck

CVE-2026-82040UTMStack < 11.2.16 SSRF via IdentityProviderService

Medium 5.0

In plain English

A medium-severity server-side request forgery in UTMStack from UTMStack. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 9% of all known vulnerabilities).

Severity (CVSS 3.1)5.0Medium

Exploit odds (30 days)0.2%top 91.0% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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 (as reported)

Vendor	Product	Versions
UTMStack	UTMStack	0 – before 11.2.16

Weakness: CWE-918 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N

References

UTMStack v11.2.16 Release Notes release-notes
Patch Commit patch
https://www.vulncheck.com/advisories/utmstack-ssrf-via-identityproviderservice third-party-advisory