CVE-2026-55761
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.
- Affected products
- Portainer Community Edition, Red Os
- Portainer
- < 2.39.4, 2.43.0
- Fix
- Available
- CVSS 4.0
- 7.1 HIGH
- CVSS 3.1
- 5.9 MEDIUM
- EPSS
- 0.3% (21th percentile)
- Weakness
- CWE-287
- NVD status
- Analyzed
- Published
- 2026-07-08
No indexed exploits for CVE-2026-55761 yet
Our index is partial: it proves presence, never absence
No exploit for CVE-2026-55761 has been indexed yet. Our index is built from live traffic and upstream syncs, so this page can only say what it knows — not that no exploit exists.