STACKIT IaaS API Privilege Escalation via Service Account Attachment_CVE-2026-39910

{
    "lastseen": "",
    "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.",
    "published": "2026-06-08T16:16:09.469Z",
    "modified": "2026-06-08T16:16:09.469Z",
    "type": "cve",
    "title": "STACKIT IaaS API Privilege Escalation via Service Account Attachment",
    "source": "VulnCheck",
    "references": "https://status.stackit.cloud\nhttps://www.vulncheck.com/advisories/stackit-iaas-api-privilege-escalation-via-service-account-attachment",
    "id": "CVE-2026-39910",
    "bulletinFamily": "",
    "cwe": [
        "CWE-862"
    ],
    "cvelist": null,
    "sourceData": "STACKIT IaaS API 0",
    "sourceHref": "",
    "cvss": {
        "score": 9.3,
        "severity": "CRITICAL",
        "vector": "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",
        "version": "4.0"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
            "attackVector": "",
            "attackComplexity": "",
            "privilegesRequired": "",
            "userInteraction": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "IaaS API",
    "version": "0",
    "vendor": "STACKIT",
    "ai_description": "Privilege escalation via service account attachment in STACKIT IaaS API",
    "ai_severity": "Critical",
    "ai_vendor": "STACKIT",
    "ai_product": "IaaS API",
    "ai_version": "0",
    "ai_score": 9.3
}