A missing authorization check in the STACKIT IaaS API allows low-privileged users to escalate privileges to full organization compromise.
Description
A missing authorization check in the STACKIT IaaS API allows low-privileged users to escalate privileges to full organization compromise.
AI Analyst Comment
Remediation
Update Unknown Multiple Products to the latest version. Monitor for exploitation attempts and review access logs.
---METADATA---
VENDOR: STACKIT
PRODUCT: IaaS API
AFFECTED_VERSIONS: See vendor advisory
---END_METADATA---
Description Summary:
A missing authorization check in the STACKIT IaaS API allows low-privileged users to escalate privileges to full organization compromise.
Executive Summary:
A critical authorization bypass in the STACKIT IaaS API allows low-privileged attackers to escalate privileges and gain full control over the organization’s cloud environment.
Vulnerability Details
CVE-ID: CVE-2026-39910
Affected Software: STACKIT IaaS API
Affected Versions: See vendor advisory
Vulnerability: The vulnerability involves a missing authorization check on the
PUT servers service-accountsendpoint. An authenticated, low-privileged attacker can attach high-privileged service accounts to virtual machines and retrieve OAuth2 tokens from the metadata service.Business Impact
With a CVSS score of 9.8, this vulnerability represents an existential risk to the organization's cloud infrastructure. An attacker exploiting this can move laterally, access high-privilege credentials, and effectively gain full administrative control over the entire organization's cloud environment, leading to massive data theft and infrastructure destruction.
Remediation Plan
Immediate Action: Update the STACKIT IaaS API to the latest version that enforces proper authorization checks on service account management.
Proactive Monitoring: Audit API logs for unauthorized modifications to virtual machine service accounts and suspicious metadata service queries.
Compensating Controls: Apply the principle of least privilege by restricting user ability to manage service accounts and monitoring for unusual OAuth2 token requests.
Exploitation Status
Public Exploit Available: No
Analyst Notes: As of Jun 8, 2026, there is no public information indicating active exploitation of this vulnerability. However, due to the nature of the flaw, the potential for exploitation is high.
Analyst Recommendation
This vulnerability is highly severe because it enables complete cloud environment takeover. Immediate patching of the IaaS API is required, alongside an audit of current service account configurations to identify any prior unauthorized escalations.