What is CVE-2026-39910?

CVE-2026-39910 is a critical-severity vulnerability in Stackit Iaas Api, classified under Missing Authorization. CVSS score: 9.8/10. Published 2026-06-08.

How severe is CVE-2026-39910?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Auth bypass in Stackit Iaas Api

CVE-2026-39910

STACKIT IaaS API contains a missing authorization check vulnerability that allows authenticated, low-privileged attackers to escalate privileges to full organization compromise by attaching arbitrary service accounts to virtual machines th…

Vulnerability class: Broken Access Control

EPSS: 0.003 (22.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Stackit Iaas Api — versions 0

Weakness classification (CWE)

CWE-862 — Missing Authorization

References

disclosure@vulncheck.com (release-notes)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2026-39910?: CVE-2026-39910 is a critical-severity vulnerability in Stackit Iaas Api, classified under Missing Authorization. CVSS score: 9.8/10. Published 2026-06-08.
How severe is CVE-2026-39910?: Critical severity. CVSS v3 base score is 9.8 out of 10.