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CVE-2026-44849— Portainer: Endpoint security bypass via Swarm service create/update

Quick assessment

Affected
portainer portainer
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 Community Edition 2.33.0版本至2.33.8之前版本、2.39.2之前版本和2.41.0之前版本存在安全漏洞，该漏洞源于Docker Swarm服务API未应用部分端点安全设置限制，导致非管理员用户可绕过容器配置限制。

AI Predicted 8.8 Difficulty: Moderate EPSS 0.45% · P37

Possible ATT&CK Techniques 1 AI

T1611 · Escape to Host

Affected Version Matrix 3

VendorProduct Version RangeStatus
portainer portainer >= 2.33.0, < 2.33.8 affected
>= 2.39.0, < 2.39.2 affected
>= 2.40.0, < 2.41.0 affected
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I. Basic Information for CVE-2026-44849

Vulnerability Information
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Vulnerability Title
Portainer: Endpoint security bypass via Swarm service create/update
Source: CVE Program / CVE List V5
Vulnerability Description
Portainer Community Edition is a lightweight service delivery platform for containerized applications that can be used to manage Docker, Swarm, Kubernetes and ACI environments. From 2.33.0 to before 2.33.8, 2.39.2, and 2.41.0, Portainer enforces seven EndpointSecuritySettings restrictions that administrators configure to restrict the container configurations non-admin users can launch: privileged mode, host PID namespace, device mapping, capabilities, sysctls, security-opt (Seccomp / AppArmor), and bind mounts. These restrictions are enforced on the standard container creation path, but several of them are not applied on the Docker Swarm service API. This vulnerability is fixed in 2.33.8, 2.39.2, and 2.41.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
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 Community Edition 2.33.0版本至2.33.8之前版本、2.39.2之前版本和2.41.0之前版本存在安全漏洞，该漏洞源于Docker Swarm服务API未应用部分端点安全设置限制，导致非管理员用户可绕过容器配置限制。
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 >= 2.33.0, < 2.33.8 -

II. Public POCs for CVE-2026-44849

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III. Intelligence Information for CVE-2026-44849

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Vendor Advisories for CVE-2026-44849 (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-2026-33590 Insecure default permissions in Portainer CE
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

IV. Related Vulnerabilities

Same product: portainer
Same vendor: portainer
Same weakness: CWE-862

V. Comments for CVE-2026-44849

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