CVE-2026-39910
CRITICAL EPSS 21.8%
Published Jun 8, 20263w ago · Modified Jun 17, 20261w ago
9.3 CVSS 4.0
Published Jun 8, 2026 3w ago
Last Modified Jun 17, 2026 1w ago
Description
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 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.
CVSS Details
Base Score
Exploitability
Impact
Vector string
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope X
Threat Intelligence
EPSS Exploit Probability
21.8% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available
Weaknesses 1
CWE-862 Missing Authorization Authorization
References 2
- status.stackit.cloud https://status.stackit.cloud
- vulncheck.com https://www.vulncheck.com/advisories/stackit-iaas-api-privilege-escalation-via-service-account-attachment
Remediation
No remediation data recorded yet
Check vendor advisories and the NVD entry for patch availability.