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

Quick assessment

Affected
Portainer Portainer Community Edition
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Portainer是Portainer开源的一款用于管理Docker环境和Docker主机的轻量级用户管理界面。 Portainer存在安全漏洞，该漏洞源于不安全的默认设置，授予常规用户主机文件系统访问和主机级代码执行权限，使得经过身份验证的非管理用户可利用这些设置读取主机文件或获取主机root权限。

AI Predicted 7.8 Difficulty: Easy EPSS 0.51% · P42

Affected Version Matrix 2

VendorProduct Version RangeStatus
Portainer Portainer Community Edition < 2.39.0 affected
< 2.38.0 affected
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I. Basic Information for CVE-2026-33590

Vulnerability Information
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Vulnerability Title
Insecure default permissions in Portainer CE
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
缺省权限不正确
Source: CVE Program / CVE List V5
Vulnerability Title
Portainer 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Portainer是Portainer开源的一款用于管理Docker环境和Docker主机的轻量级用户管理界面。 Portainer存在安全漏洞，该漏洞源于不安全的默认设置，授予常规用户主机文件系统访问和主机级代码执行权限，使得经过身份验证的非管理用户可利用这些设置读取主机文件或获取主机root权限。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Portainer Portainer Community Edition 0 ~ 2.39.0 -

II. Public POCs for CVE-2026-33590

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III. Intelligence Information for CVE-2026-33590

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Patches & Fixes for CVE-2026-33590 (2)

Security Blog Posts for CVE-2026-33590 (1)

Same Patch Batch · Portainer · 2026-05-28 · 9 CVEs total

CVE-2026-44850 8.5 HIGH Portainer: Bind-mount restriction bypass via HostConfig.Mounts
CVE-2026-44882 8.1 HIGH Portainer: Kubernetes middleware continues after token validation failure, bypassing endpo
CVE-2026-44885 5.5 MEDIUM Portainer: Path traversal in backup archive extraction allows arbitrary file write
CVE-2026-44881 Portainer: Arbitrary File Read via Git Symlink Injection in Stack Auto-Update
CVE-2026-44884 Portainer: Missing authorization on custom template file endpoint exposes template content
CVE-2026-44848 Portainer: Missing authorization on Docker plugin endpoints allows host RCE
CVE-2026-44883 Portainer: JWT accepted in URL query leaks tokens to logs and referers
CVE-2026-44849 Portainer: Endpoint security bypass via Swarm service create/update

IV. Related Vulnerabilities

Same vendor: Portainer
Same weakness: CWE-276

V. Comments for CVE-2026-33590

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