---
id: CVE-2026-79994
title: >-
  The guest-to-host Unix-domain socket relay in Docker Sandboxes validates that
  a socket path is inside an authorized workspace, but later reconnects using
  the pathname
summary: >-
  The guest-to-host Unix-domain socket relay in Docker Sandboxes validates that
  a socket path is inside an authorized workspace, but later reconnects using
  the pathname. A malicious guest can replace an intermediate directory with a
  symlin…
severity: high
cvss: 8.7
cvssVector: 'CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N'
cwe:
  - CWE-367
vendor: Docker
product: Docker Sandboxes
affected:
  - sandboxes >= 0.37.0 < 0.42.0
published: '2026-09-15'
updated: '2026-09-16'
sourceUpdated: '2026-09-16T20:38:33.883'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-79994'
references:
  - url: 'https://docs.docker.com/ai/sandboxes/'
    label: security@docker.com
  - url: 'https://docs.docker.com/ai/sandboxes/security/isolation/'
    label: security@docker.com
  - url: 'https://github.com/docker/sailor/pull/2021'
    label: security@docker.com
  - url: 'https://github.com/docker/sandboxes/pull/5342'
    label: security@docker.com
  - url: 'https://github.com/docker/sbx-releases/releases/tag/v0.42.0'
    label: security@docker.com
  - url: 'https://github.com/docker/sbx-releases/releases/tag/v0.41.0'
    label: security@docker.com
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-09-16T17:56:16.161335Z'
cvssSource: cna
ingestedAt: '2026-09-15T20:44:02.612Z'
epss: 0.00139
epssPercentile: 0.02663
---

## Overview

The guest-to-host Unix-domain socket relay in Docker Sandboxes validates that a socket path is inside an authorized workspace, but later reconnects using the pathname. A malicious guest can replace an intermediate directory with a symlink between validation and connection, causing the host to connect to an arbitrary AF_UNIX socket outside the shared workspace. This can expose data or host-side capabilities provided by the targeted socket.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.