CVE-2026-42306

Description

Docker: Race condition in docker cp allows bind mount redirection to host path

Overview

State

—

Assigner (CNA)

—

CVSS severity

high

CVSS score

7.2 / 10

CVSS vector

AV:L/AC:H/PR:L/UI:R/S:C/C:N/I:H/A:H

Effective score

7.2 / 10 HIGH source: CNA overview

CWE(s)

—

Reserved

—

Published

—

Last updated

—

Source

https://www.tenable.com/cve/CVE-2026-42306

Linked Threat

CVE-2026-42306 — CVE-2026-42306

European Union Vulnerability Database ENISA EUVD

ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.

EUVD ID

EUVD-2026-36528

Assigner

GitHub_M

Published

Jun 12, 2026, 6:09:22 PM

Updated

Jun 13, 2026, 3:25:47 AM

EUVD base score (CVSS 3.1)

7.2 / 10
CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:N/I:H/A:H

EUVD-reported EPSS

0.1000

Vendors

moby

Products

moby (github.com/docker/docker/daemon ≤ 28.5.2)

moby (Docker Engine < 29.5.1)

moby (github.com/moby/moby/v2/daemon < 2.0.0-beta.14)

Aliases

GHSA-rg2x-37c3-w2rh

ENISA description: Moby is an open source container framework. In Docker Engine prior to version 29.5.1, Docker Daemon versions 28.5.2 and prior, and Moby Daemon prior to version 2.0.0-beta.14, a race condition during docker cp mount setup allows a malicious container to redirect a bind mount target to an arbitrary host path, potentially overwriting host files or causing denial of service. This issue has been patched in Docker Engine version 29.5.1 and Moby Daemon version 2.0.0-beta.14.

Vendor references (0)

References embedded in the original CVE record by the assigning CNA.

None in the CVE record.

Web references (2)

DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.

• https://nvd.nist.gov/vuln/detail/CVE-2026-42306 tenable:nvd.nist.gov
• https://www.cve.org/CVERecord?id=CVE-2026-42306 tenable:www.cve.org

Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.

• Security Advisory Bulletin 064 | Ubiquiti Community
  web:community.ui.com

  Published: May 21, 2026 Updated: May 22, 2026 Version: 1.1 Revision: 1.1 Summary 1 of 5 A malicious actor with access to the network and high privileges could exploit an Improper Input Validation vulnerability found in UniFi OS devices to execute a Command Injection. Affected Products: UniFi OS Server (Version 5.0.6 and earlier) Mitigation : Update your UniFi OS Server to Version 5.0.8 or later ...

  2026-05-26 02:57 UTC
• CVE-2026-42306 - Exploits & Severity - Feedly
  web:feedly.com

  Mitigation Update Docker to the patched version. Restrict which users are allowed to run containers and execute docker cp operations. Limit container capabilities and implement network policies to prevent malicious containers from impacting the host system. Monitor for suspicious docker cp operations and validate mount paths before execution.

  2026-05-26 02:57 UTC
• SAP Releases Patch for Critical SQL Injection Flaw in S/4HANA
  web:gbhackers.com

  Beyond the two critical flaws, the May 2026 security update addresses several other significant vulnerabilities that require prompt mitigation . A high-severity operating system command injection flaw, identified as CVE - 2026 -34259, impacts the forecasting and replenishment software suite.

  2026-05-26 02:57 UTC
• Patch Tuesday, April 2026 Edition - Krebs on Security
  web:krebsonsecurity.com

  For a clickable, per- patch breakdown, check out the SANS Internet Storm Center Patch Tuesday roundup. Running into problems applying any of these updates?

  2026-05-26 02:57 UTC
• Security Update Guide - Microsoft
  web:msrc.microsoft.com

  The Microsoft Security Response Center (MSRC) investigates all reports of security vulnerabilities affecting Microsoft products and services, and provides the information here as part of the ongoing effort to help you manage security risks and help keep your systems protected.

  2026-05-26 02:57 UTC
• CVE-2026-42306: Docker Race Condition in docker cp Allows Bind Mount ...
  web:vulert.com

  Learn about CVE-2026-42306 , a Docker vulnerability that allows bind mount redirection to host paths. Understand its impact, how to fix it, and explore workarounds.

  2026-05-26 02:57 UTC
• April 2026 Patch Tuesday: Updates and Analysis | CrowdStrike
  web:www.crowdstrike.com

  Microsoft's April 2026 Patch Tuesday addresses 164 CVEs , featuring 8 Critical vulnerabilities, one exploited zero-day, and one disclosed zero-day.

  2026-05-26 02:57 UTC
• Oracle Critical Patch Update Advisory - April 2026
  web:www.oracle.com

  This Critical Patch Update contains 481 new security patches across the product families listed below. Please note that an MOS note summarizing the content of this Critical Patch Update and other Oracle Software Security Assurance activities is located at April 2026 Critical Patch Update: Executive Summary and Analysis.

  2026-05-26 02:57 UTC
• CVE 2026 — The Vulnerabilities That Matter Most Right Now
  web:www.penligent.ai

  Second, chipset and OEM dependencies make remediation slower and messier than software-only patching. Google's bulletin explains the two Android patch levels for March 2026 and clarifies that devices with security patch levels of 2026 -03-01 or 2026 -03-05 are protected against the associated issues, depending on applicable components.

  2026-05-26 02:57 UTC
• Patch Tuesday May 2026: Security Updates & CVE Analysis
  web:zecurit.com

  Get the complete breakdown of Microsoft's May 2026 Patch Tuesday. We analyze the latest security updates and all critical CVEs .

  2026-05-26 02:57 UTC

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