EUVD-2026-42297Severity by source
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:H/SI:H/SA:H/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
Primary rating from Vendor (GitHub_M) · only source for this CVE.
CVSS VectorVendor: GitHub_M
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:H/SI:H/SA:H/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
Lifecycle Timeline
3DescriptionCVE.org
Portainer Community Edition is a lightweight service delivery platform for containerized applications that can be used to manage Docker, Swarm, Kubernetes and ACI environments. In versions 2.39.0 through 2.39.3 and 2.40.0 until 2.43.0, unauthenticated restore and administrator initialization endpoints (/api/restore and /api/users/admin/init) remain accessible during the five-minute setup window for uninitialized instances, allowing a network attacker to restore a crafted backup or create the first administrator account and gain full administrative access. This issue is fixed in versions 2.39.4 and 2.43.0.
Articles & Coverage 2
AnalysisAI
Authentication bypass in Portainer Community Edition (2.39.0-2.39.3 and 2.40.0 through 2.42.x) lets an unauthenticated network attacker seize full administrative control of a freshly deployed, uninitialized instance. During the five-minute post-deployment setup window the /api/restore and /api/users/admin/init endpoints stay reachable without credentials, so an attacker who wins the race can create the first admin account or restore a crafted backup and take over the platform along with every Docker, Swarm, Kubernetes and ACI environment it manages. …
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Recommended ActionAI
Within 24 hours: Inventory all Portainer Community Edition instances and identify affected versions (2.39.0-2.39.3, 2.40.0-2.42.x); restrict network access to /api/restore and /api/users/admin/init endpoints to trusted networks only. …
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External POC / Exploit Code
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