CVE-2026-55761

mediumCVSS 5.9covered by 1 sourcefirst seen 2026-07-08

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.

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Exploitation outlook

Low exploitation risk0.31% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 23% of all EPSS-scored CVEs.

Advisory coverage (1)

mediumCVE-2026-55761: Portainer Community Edition is a lightweight service delivery platform for containerized appli…nvd · 2026-07-08

External references

NVD record for CVE-2026-55761

CVE.org record

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