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OpenAdvisories
Critical · 9.4 CVE-2026-44849 EUVD-2026-33063GHSA-5fxq-qcf3-244wGO-2026-5143

Portainer: Endpoint security bypass via Swarm service create/update

Published May 28, 2026 · Updated May 29, 2026 · Assigned by GitHub_M

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. From 2.33.0 to before 2.33.8, 2.39.2, and 2.41.0, Portainer enforces seven EndpointSecuritySettings restrictions that administrators configure to restrict the container configurations non-admin users can launch: privileged mode, host PID namespace, device mapping, capabilities, sysctls, security-opt (Seccomp / AppArmor), and bind mounts. These restrictions are enforced on the standard container creation path, but several of them are not applied on the Docker Swarm service API. This vulnerability is fixed in 2.33.8, 2.39.2, and 2.41.0.

Affected products

VendorProductAffectedFixed
portainer portainer >= 2.33.0, < 2.33.8, >= 2.39.0, < 2.39.2, >= 2.40.0, < 2.41.0 —

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.

ReleasePackageFixed inAdvisory
openSUSE Leap 16.0 govulncheck-vulndb 0.0.20260723T184607-160000.1.1 openSUSE-SU-2026:21483-1

Affected packages

EcosystemPackageAffectedFixedRecord
Go github.com/portainer/portainer >= 2.33.0, < 2.33.8 2.33.8 GHSA-5fxq-qcf3-244w
Go github.com/portainer/portainer >= 2.39.0, < 2.39.2 2.39.2 GHSA-5fxq-qcf3-244w
Go github.com/portainer/portainer >= 2.40.0, < 2.41.0 2.41.0 GHSA-5fxq-qcf3-244w
Go github.com/portainer/portainer all versions — GO-2026-5143

Advisories 1

References