Authorization Bypass in Portainer Community Edition
CVE-2026-44882

8.1HIGH

Key Information:

Vendor

Portainer

Status
Portainer
Vendor
CVE Published:
28 May 2026

What is CVE-2026-44882?

In Portainer Community Edition versions 2.33.0 to 2.33.7, a flaw in the kubeClientMiddleware allows requests to bypass authorization checks when token validation fails. This occurs because an HTTP 403 response is issued without halting the execution, enabling potential unauthorized access to Kubernetes endpoints if the attacker possesses a valid Portainer session. This issue affects both Community and Enterprise editions of Portainer and is resolved in version 2.33.8.

Affected Version(s)

portainer >= 2.33.0, < 2.33.8

References

https://github.com/portainer/portainer/security/advisorie...
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CVSS V3.1

Score:
8.1
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.