Description
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
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| portainer | portainer | >= 2.39.0, < 2.39.4 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 16.0 | govulncheck-vulndb | 0.0.20260902T191204-160000.1.1 | SUSE-SU-2026:23712-1, SUSE-SU-2026:23692-1 |
| SLES 16.0 | govulncheck-vulndb | 0.0.20260902T191204-160000.1.1 | SUSE-SU-2026:23712-1, SUSE-SU-2026:23692-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 16.0 | govulncheck-vulndb | 0.0.20260902T191204-160000.1.1 | openSUSE-SU-2026:21812-1 |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| Go | github.com/portainer/portainer | >= 2.39.0, < 2.39.4 | 2.39.4 | GHSA-x626-fcwx-f5pc |
| Go | github.com/portainer/portainer | >= 2.40.0, < 2.43.0 | 2.43.0 | GHSA-x626-fcwx-f5pc |
| Go | github.com/portainer/portainer | all versions | — | GO-2026-6324 |
Advisories 3
- SUSE-SU-2026:23692-1 Security update for govulncheck-vulndb SUSE / openSUSE Security Updates · Sep 29, 2026
- SUSE-SU-2026:23712-1 Security update for govulncheck-vulndb SUSE / openSUSE Security Updates · Sep 29, 2026
- openSUSE-SU-2026:21812-1 Security update for govulncheck-vulndb SUSE / openSUSE Security Updates · Sep 10, 2026
References
- https://github.com/portainer/portainer/security/advisories/GHSA-x626-fcwx-f5pc
- https://github.com/portainer/portainer/issues/2770
- https://github.com/portainer/portainer/commit/49f19107cf9a3540cbe406c9eb7f24390e1af02b
- https://github.com/portainer/portainer/commit/d2b56efcb4e43c4168bb6688eee9f6bf22867312
- https://github.com/portainer/portainer/releases/tag/2.39.4
- https://github.com/portainer/portainer/releases/tag/2.43.0