CVE-2026-44850Network attack vector

Host file read-write access via unchecked Mounts

Published May 28, 2026 · Updated May 28, 2026

Authorization bypass in affected Portainer Community Edition releases allows remote authenticated users to read or write Docker host files. The container-create proxy's decorateContainerCreationOperation inspects HostConfig.Binds but omits equivalent bind entries in HostConfig.Mounts. A regular user needs container-create rights on a Docker environment with bind mounts disabled for non-administrators; crafted Mounts entries then expose any host path available to the Docker daemon.

CVSS severity8.5
High
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Authorization bypass in affected Portainer Community Edition releases allows remote authenticated users to read or write Docker host files. The container-create proxy's decorateContainerCreationOperation inspects HostConfig.Binds but omits equivalent bind entries in HostConfig.Mounts. A regular user needs container-create rights on a Docker environment with bind mounts disabled for non-administrators; crafted Mounts entries then expose any host path available to the Docker daemon.

The record

CVE
CVE-2026-44850
Published
May 28, 2026
Updated
May 28, 2026
Vendor
Portainer
Product
Portainer Community Edition
Classifications
CWE-863, T1611
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 28, 2026CVE publishedPublication date reported by the CVE source.
  2. May 28, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=>= 2.33.0, < 2.33.8
  2. Affected versionversion=>= 2.39.0, < 2.39.2
  3. Affected versionversion=>= 2.40.0, < 2.41.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Portainer · Portainer Community Editionversion=>= 2.33.0, < 2.33.8; version=>= 2.39.0, < 2.39.2; version=>= 2.40.0, < 2.41.0

Published CVSS scores

8.5GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-863Incorrect Authorization
T1611Escape to Host

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo