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Vulnerability record · CVE-2026-33590 · published 28 May 2026

CVE-2026-33590: Incorrect default permissions vulnerability

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.

8.5 CVSS 4.0 High EPSS 0.51% · top 58.6% CWE-276 · Incorrect default permissions Awaiting Analysis
8.5CVSS 4.0 base score
0.51%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
4References
17 Jun 2026Last modified by NVD

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.

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

LinkTags
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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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-33590), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.