Medium 5.7Published Aug 12, 2026

CVE-2026-18171Docker Sandboxes read-only runtime mount writable through its shared-export alias

Updated under an hour ago (2026-10-19 10:00 UTC)

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It affects Docker Sandboxes. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for Docker Sandboxes

Exploited in the last 30 days

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.

CVSS: 5.7 MEDIUM (v4.0, CNA)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
Weakness (CWE): CWE-863
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Docker
NVD analysis: Awaiting Analysis
Record last updated: Aug 12, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Docker Docker Sandboxes docker:docker_sandboxes	from 0.35.0 through 0.38.0	CNA record

References

https://docs.docker.com/ai/sandboxes/product
https://docs.docker.com/ai/sandboxes/architecture/product

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.