Authentication Bypass Vulnerability in Portainer CE by Portainer
CVE-2026-72533

8.8HIGH

Key Information:

Vendor

Portainer

Status
Portainer Ce
Vendor
CVE Published:
11 August 2026

What is CVE-2026-72533?

An authentication bypass vulnerability present in Portainer CE version 2.44.0 enables low-privileged users to circumvent Docker proxy authorization checks. This is made possible through non-canonical URL normalization, leading to inconsistent request handling by the proxy and the authorization layer. As a result, attackers can exploit this flaw to gain root-level access to the Docker host, posing significant security threats to affected systems.

Affected Version(s)

Portainer CE 0 <= 2.44.0

References

https://github.com/portainer/portainer

CVSS V3.1

Score:
8.8
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

Credit

Bobur Abdugafforov (Mahadsec)
.