EUVD-2026-322743

fkie_cve-2026-44849

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.

GHSA-5fxq-qcf3-244w — Portainer has an endpoint security bypass via Swarm service create/update

Affected: Go: github.com/portainer/portainer

## Summary

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**.

The vulnerability is exposed when a non-admin Portainer user (Standard User role, or any role granted endpoint-level access) has been given access to a Docker Swarm endpoint via Portainer RBAC. Admins and users without Swarm endpoint access are not affected.

These restrictions are enforced on the standard container creation path, but several of them are not applied on the Docker Swarm service API:

- `POST /services/create` — **1 of 7** checks applied. `CapabilityAdd`, `CapabilityDrop`, `Sysctls`, and `Privileges` (Seccomp / AppArmor) are not parsed from the request body and are forwarded to the Docker daemon without validation. - `POST /services/{id}/update` — **0 of 7** checks applied. The route dispatches to the generic `restrictedResourceOperation`, which validates RBAC ownership but does not inspect the request body or call `fetchEndpointSecuritySettings()`.

The `EndpointSecuritySettings` checks apply when the administrator has configured any of `AllowContainerCapabilitiesForRegularUsers`, `AllowSysctlSettingForRegularUsers`, `AllowSecurityOptForRegularUsers`, or `AllowBindMountsForRegularUsers` to restrict standard users.

A regular user wi…

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bdu:2026-08526

EUVD-2026-322743

fkie_cve-2026-44849

GHSA-5fxq-qcf3-244w — Portainer has an endpoint security bypass via Swarm service create/update