CVE-2026-79994

Docker Sandboxes UDS forwarder can reach arbitrary host Unix sockets through a symlink race

Published Sep 15, 2026 CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed
Description
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

Vendor Workaround

Use --clone mode and avoid additional read-write host mounts: https://docs.docker.com/ai/sandboxes/usage/#clone-mode

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Docker sandboxes
Vendors & Products Docker sandboxes
Type Values Removed Values Added
Description 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.
Title Docker Sandboxes UDS forwarder can reach arbitrary host Unix sockets through a symlink race
First Time appeared Docker
Docker docker Sandboxes
Weaknesses CWE-367
CPEs cpe:2.3:a:docker:docker_sandboxes:*:*:*:*:*:*:*:*
Vendors & Products Docker
Docker docker Sandboxes
References
Metrics cvssV4_0

{'score': 8.7, 'vector': '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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
Docker
Published
Updated
Sep 16, 2026, 5:57 PM
Reserved
Aug 25, 2026, 4:47 PM
Status
Awaiting Analysis
Published
Sep 15, 2026, 9:16 PM
Modified
Sep 16, 2026, 8:38 PM