{"id":"CVE-2026-39910","title":"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 …","summary":"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 …","severity":"high","cvss":8.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-862"],"published":"2026-06-08","updated":"2026-08-24","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-39910","references":[{"url":"https://status.stackit.cloud","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/stackit-iaas-api-privilege-escalation-via-service-account-attachment","label":"disclosure@vulncheck.com"}],"tags":["nvd"],"epss":0.00261,"epssPercentile":0.18186,"ingestedAt":"2026-08-24T12:02:50.415Z","slug":"CVE-2026-39910","body":"## Overview\n\nSTACKIT 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 they control. Attackers can exploit the unvalidated PUT servers service-accounts endpoint to attach high-privileged service accounts and query the Instance Metadata Service to retrieve OAuth2 tokens, bypassing tenant boundaries and gaining unauthorized control over the entire organization environment.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":48,"depthScoreParts":{"impact":48.4,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}