CVE-2026-72533
HighCVSS 8.8Summary
An authentication bypass vulnerability in Portainer CE through 2.44.0 allows authenticated low-privileged users to bypass Docker proxy authorization checks via non-canonical URL normalization, defeating all authorization middleware. The proxy endpoint fails to normalize request paths before applying access controls, allowing crafted requests to be interpreted differently by the proxy and the authorization layer.
Risk Assessment
Risk of an attacker gaining root-level access to the underlying Docker host, potentially leading to full system and data compromise.
Recommendation
Upgrade Portainer CE to a patched version. Additionally, restrict access to the Portainer interface and monitor for unusual requests.
Original NVD description (English source)
An authentication bypass vulnerability in Portainer CE through 2.44.0 allows authenticated low-privileged users to bypass Docker proxy authorization checks via non-canonical URL normalization, defeating all authorization middleware. The proxy endpoint fails to normalize request paths before applying access controls, allowing crafted requests to be interpreted differently by the proxy and the authorization layer. Successful exploitation grants the attacker root-level access to the underlying Docker host.