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Vulnerability · Published May 28, 2026 · Assigned by GitHub_M

CVE-2026-44849Portainer: Endpoint security bypass via Swarm service create/update

Critical 9.4

In plain English

A critical-severity missing 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 0.4% (higher than 37% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 4.0)9.4Critical
Exploit odds (30 days)0.4%top 63.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

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 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 packages & fixed versions

EcosystemPackageFixed inAdvisory
Gogithub.com/portainer/portainer2.33.8GHSA-5fxq-qcf3-244w
Gogithub.com/portainer/portainer2.39.2GHSA-5fxq-qcf3-244w
Gogithub.com/portainer/portainer2.41.0GHSA-5fxq-qcf3-244w
Gogithub.com/portainer/portainerno fix listedGO-2026-5143

Affected products (as reported)

VendorProductVersions
portainer portainer >= 2.33.0, < 2.33.8>= 2.39.0, < 2.39.2>= 2.40.0, < 2.41.0

Weakness: CWE-862 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

References