All vulnerabilities
CVE-2026-44848GHSA-rrmm-9v76-h3p4GO-2026-5639

Portainer: Missing authorization on Docker plugin endpoints allows host RCE

portainer portainerGoApplications & CMS
Open in ThreatlineRecord JSON
CVSS
9.4Critical
ExploitationPublic exploit codeCISA's assessment says proof of concept code is public, assessed 1 Jun 2026. Not in the KEV catalogCISA via CVE List
Exploit odds (EPSS)0.45%Chance of exploitation activity in the next 30 days, higher than 37% of CVEs. Scored 24 Oct 2026FIRST EPSS
Fixed in2.33.8Also 2.39.2, 2.41.0OSV
Published28 May 2026Updated 25 Jun 2026CVE List

What fixes it

  • 2.33.8github.com/portainer/portainer, GoOSVgo get github.com/portainer/portainer@v2.33.8
  • 2.39.2github.com/portainer/portainer, GoOSVgo get github.com/portainer/portainer@v2.39.2
  • 2.41.0github.com/portainer/portainer, GoOSVgo get github.com/portainer/portainer@v2.41.0

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

Timeline

  1. 28 May 2026, 21:08 UTCPublishedCVE List
  2. 24 Oct 2026, 21:17 UTCExploit code publicGitHub proof-of-concept repositories

Reports 1

1 outlet mention it. Reports are not confirmation; each links to its source.

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, The Docker plugin management endpoints (/plugins/*) were not registered with a handler, so standard users with endpoint access could call privileged plugin operations — including installing and enabling plugins — directly against the underlying Docker daemon. 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 endpoint via Portainer RBAC. This vulnerability is fixed in 2.33.8, 2.39.2, and 2.41.0.

Text from CVE List

Affected versions 6

  • portaineraffected: >= 2.33.0, < 2.33.8CVE List
  • portaineraffected: >= 2.39.0, < 2.39.2CVE List
  • portaineraffected: >= 2.40.0, < 2.41.0CVE List
  • github.com/portainer/portainer, Gofrom 2.33.0, fixed in 2.33.8OSV
  • github.com/portainer/portainer, Gofrom 2.39.0, fixed in 2.39.2OSV
  • github.com/portainer/portainer, Gofrom 2.40.0, fixed in 2.41.0OSV

References 1