What is CVE-2026-82040?

CVE-2026-82040 is a medium-severity vulnerability in Utmstack, classified under Server-Side Request Forgery (SSRF). CVSS score: 5.0/10. Published 2026-10-02.

How severe is CVE-2026-82040?

Medium severity. CVSS v3 base score is 5.0 out of 10.

SSRF in Utmstack

CVE-2026-82040

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.

Vulnerability class: SSRF (Server-Side Request Forgery)

Published 2026-10-02.

CVSS v3 metric

CVSS v3 base score 5.0 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Utmstack

Weakness classification (CWE)

CWE-918 — Server-Side Request Forgery (SSRF)

References

github.com/UTMStack/UTMStack/releases/tag/v11.2.16 (release-notes)
github.com/utmstack/UTMStack/commit/4e7a727c3b8d8e2ad020d3b4f982a6d085dbecdd (patch)
www.vulncheck.com/advisories/utmstack-ssrf-via-identityproviderservice (third-party-advisory)

Frequently asked questions

What is CVE-2026-82040?: CVE-2026-82040 is a medium-severity vulnerability in Utmstack, classified under Server-Side Request Forgery (SSRF). CVSS score: 5.0/10. Published 2026-10-02.
How severe is CVE-2026-82040?: Medium severity. CVSS v3 base score is 5.0 out of 10.