CVE-2026-33590

Description

Insecure default settings of Portainer CE grant regular (non-admin) users privileges that allow host filesystem access and host-level code execution. An authenticated non-administrative user with endpoint access can exploit these settings to read host files or obtain root equivalent access on the host.

References

• https://github.com/portainer/portainer/commit/3e2fdb1891e81a8e4c5c8beb60e45f07c8ecae52
• https://github.com/portainer/portainer/commit/ac8fa7672e732b44b970c9eaf928eddd2c68796c
• https://intwave.com/blog/2026/02/26/improving-portainer-security.html