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CVE-2026-44850— Portainer: Bind-mount restriction bypass via HostConfig.Mounts

Quick assessment

Affected
portainer portainer
Exploitation
Public or AI PoC available; prioritize validation
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 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，该漏洞源于禁用绑定挂载的安全设置仅检查HostConfig.Binds数组而未检查HostConfig.Mounts数组，允许具有容器创建权限的认证用户通过HostConfig.Mounts提交绑定类型条目挂载任意主机路径。

CVSS 8.5 · High EPSS 0.30% · P21

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter

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-2026-44850

Vulnerability Information
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Vulnerability Title
Portainer: Bind-mount restriction bypass via HostConfig.Mounts
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 offers an environment-level Disable bind mounts for non-administrators security setting that blocks regular users from binding host paths into containers they create through the Portainer-mediated Docker API. The check that enforces this setting only inspected the legacy HostConfig.Binds array on the container-create proxy and never looked at the equivalent HostConfig.Mounts array. Any authenticated user with rights to create containers on a Docker environment where the restriction is enabled could submit a bind-typed entry under HostConfig.Mounts and mount any host path into their container. This vulnerability is fixed in 2.33.8, 2.39.2, and 2.41.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制不正确
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 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，该漏洞源于禁用绑定挂载的安全设置仅检查HostConfig.Binds数组而未检查HostConfig.Mounts数组，允许具有容器创建权限的认证用户通过HostConfig.Mounts提交绑定类型条目挂载任意主机路径。
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-2026-44850

# POC Description Source Link Shenlong Link
AI-Generated POC Verified env Premium
Qwen3.6-35B-A3B · 7964 chars
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In-depth vulnerability mechanism
Trigger conditions & impact
Full executable POC code
Exploit chain & mitigation
POC zip download
100+ AI POC generations per month

III. Intelligence Information for CVE-2026-44850

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Vendor Advisories for CVE-2026-44850 (1)

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

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

IV. Related Vulnerabilities

Same product: portainer
Same vendor: portainer
Same weakness: CWE-863

V. Comments for CVE-2026-44850

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