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CVE-2026-39910

CRITICAL
9.8
CVSS 3.1
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.

Metadata

CVE ID
CVE-2026-39910
State
PUBLISHED
Assigner
VulnCheck
Reserved
2026-04-07 20:57 UTC
Published
2026-06-08 16:16 UTC
Last updated
2026-06-09 15:47 UTC
Primary CWE
CWE-862
Missing Authorization
Vendor / Product
STACKIT / IaaS API
Sources
cve.org  ·  NVD

Severity & Metrics

9.8 CRITICAL CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
SSVC — CISA Coordinator
Exploitation
none
Automatable
yes
Tech. Impact
total
Affected products (1)
VendorProductPlatformVersions
STACKIT IaaS API — 0 < 2026-05-28
Weakness (CWE)
CWESourceDescription
CWE-862 cna Missing Authorization
CVSS scores (2)
ScoreSeverityVersionSourceVector
9.8 CRITICAL 3.1 cna CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.3 CRITICAL 4.0 cna 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
References (2)
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