Description
Docker Sandboxes (sbx) applies the read-only intent of a runtime host mount to the in-guest container bind only: the underlying virtio-fs host-edge grant is added to the sandbox's policy-share allowlist with no access mode. The directory stays writable at its shared-export path, so unprivileged code inside the sandbox can derive that path and write to a host directory the operator attached read-only.
Published: 2026-08-12
Score: 5.7 Medium
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Wed, 12 Aug 2026 17:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

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


Wed, 12 Aug 2026 15:15:00 +0000

Type Values Removed Values Added
Description Docker Sandboxes (sbx) applies the read-only intent of a runtime host mount to the in-guest container bind only: the underlying virtio-fs host-edge grant is added to the sandbox's policy-share allowlist with no access mode. The directory stays writable at its shared-export path, so unprivileged code inside the sandbox can derive that path and write to a host directory the operator attached read-only.
Title Docker Sandboxes read-only runtime mount writable through its shared-export alias
First Time appeared Docker
Docker docker Sandboxes
Weaknesses CWE-863
CPEs cpe:2.3:a:docker:docker_sandboxes:*:*:*:*:*:*:*:*
Vendors & Products Docker
Docker docker Sandboxes
References
Metrics cvssV4_0

{'score': 5.7, 'vector': 'CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N'}


Subscriptions

Docker Docker Sandboxes
cve-icon MITRE

Status: PUBLISHED

Assigner: Docker

Published:

Updated: 2026-08-12T17:02:13.455Z

Reserved: 2026-07-28T21:28:23.642Z

Link: CVE-2026-18171

cve-icon Vulnrichment

Updated: 2026-08-12T17:02:04.406Z

cve-icon NVD

Status : Received

Published: 2026-08-12T15:17:32.477

Modified: 2026-08-12T15:17:32.477

Link: CVE-2026-18171

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses