CVE-2026-33590

Summary

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 Software

Weaknesses

• CWE-276: CWE-276 Incorrect default permissions

ADP Enrichment

CISA ADP Vulnrichment

• SSVC:
• Exploitation: none
  • Automatable: no
  • Technical Impact: total

CVE Program Container

Additional References

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

References

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

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