CVE-2026-33590 Insecure default permissions in Portainer CE
Authenticated non-admin users can exploit insecure default permissions in Portainer CE to read host files and execute code with root privileges.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-33590?
CVE-2026-33590 is a high-severity vulnerability in Portainer Community Edition, published on 28 May 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official 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.
Weakness: CWE-276
Which versions are affected by CVE-2026-33590?
How do I fix CVE-2026-33590?
No fix has been published for CVE-2026-33590 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-33590 being exploited?
There is no known exploitation of CVE-2026-33590 in the wild and no public exploit code.
Sources
Also known as GHSA-frhv-529m-5v9v.