Auth bypass in Portainer
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.
Vulnerability class: Broken Access Control
EPSS: 0.003 (27.6th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Portainer — versions 2.40.0, >= 2.39.0, < 2.39.2, >= 2.40.0, < 2.41.0
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2026-44849?
- CVE-2026-44849 is a high-severity vulnerability in Portainer, classified under Missing Authorization. CVSS score: 8.8/10. Published 2026-05-28.
- How severe is CVE-2026-44849?
- High severity. CVSS v3 base score is 8.8 out of 10.