CVE-2026-41567

Host-root code execution via container-resolved decompressor

Published Jun 5, 2026 · Updated Jun 5, 2026

Code execution in Docker Engine before 29.5.1 allows local users to run arbitrary code as host root through compressed archive upload. The daemon resolves xz or unpigz through a PATH rooted in the container filesystem before invoking the decompressor with daemon privileges. Exploitation requires a malicious image containing the replacement binary and a user who explicitly uploads an xz- or gzip-compressed archive.

CVSS severity7.2
High
EPSS probability0.16%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Code execution in Docker Engine before 29.5.1 allows local users to run arbitrary code as host root through compressed archive upload. The daemon resolves xz or unpigz through a PATH rooted in the container filesystem before invoking the decompressor with daemon privileges. Exploitation requires a malicious image containing the replacement binary and a user who explicitly uploads an xz- or gzip-compressed archive.

The record

CVE
CVE-2026-41567
Published
Jun 5, 2026
Updated
Jun 5, 2026
Vendor
Docker
Product
Docker Engine
Classifications
CWE-427, T1611
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 5, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 5, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=<= 28.5.2
  2. Affected versionversion=< 29.5.1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Docker · Docker Engineversion=<= 28.5.2; version=< 29.5.1

Published CVSS scores

7.5Red HatCVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:H
7.2GitHub, Inc.CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:H/I:H/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)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-427Uncontrolled Search Path Element
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

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Your stack

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