Vulnerability · Published May 28, 2026 · Assigned by GitHub_M
CVE-2026-44850Portainer: Bind-mount restriction bypass via HostConfig.Mounts
High 8.5
In plain English
A high-severity incorrect authorization in portainer from portainer. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 14% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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 offers an environment-level Disable bind mounts for non-administrators security setting that blocks regular users from binding host paths into containers they create through the Portainer-mediated Docker API. The check that enforces this setting only inspected the legacy HostConfig.Binds array on the container-create proxy and never looked at the equivalent HostConfig.Mounts array. Any authenticated user with rights to create containers on a Docker environment where the restriction is enabled could submit a bind-typed entry under HostConfig.Mounts and mount any host path into their container. This vulnerability is fixed in 2.33.8, 2.39.2, and 2.41.0.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Go | github.com/portainer/portainer | 2.33.8 | GHSA-7fw3-x4r2-g7wc |
| Go | github.com/portainer/portainer | 2.39.2 | GHSA-7fw3-x4r2-g7wc |
| Go | github.com/portainer/portainer | 2.41.0 | GHSA-7fw3-x4r2-g7wc |
| Go | github.com/portainer/portainer | no fix listed | GO-2026-5217 |
Affected products (as reported)
Weakness: CWE-863 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N
References
- https://github.com/portainer/portainer/security/advisories/GHSA-7fw3-x4r2-g7wc x_refsource_CONFIRM