What’s Vulnerable › Vulnerabilities

CVE-2026-33590: Insecure default permissions in Portainer CE

• Severity: high (CVSS 8.5 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-05-28 · updated 2026-10-26
• Weakness: CWE-276

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.

Affected products

• Portainer Community Edition: before 2.39.0; before 2.38.0 — fixed in 2.38.0, 2.39.0

How to fix

Upgrade to a fixed version: Portainer Community Edition 2.38.0, 2.39.0. Check the vendor advisory for mitigations.

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
• http://www.openwall.com/lists/oss-security/2026/06/12/2

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