CVE-2026-18171: Docker Sandboxes read-only runtime mount writable through its shared-export alias
Medium · CVSS 5.7 (CVSS 4.0)EPSS 0.14%, 3th percentilePublished Updated Assigner: Docker
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.
CWE-863
Tracked companies
Mapped from the CVE’s affected-product data, NVD CPE matches, vendor advisories or package feeds. A mapping means the vendor’s software is named, not that its hosted service was exposed.
Status incidents that name it
No tracked status incident names this CVE.
Affected vendors and products
Docker: Docker Sandboxes
References
- CVE record on cve.org (opens in new tab)
- NVD entry (opens in new tab)
- docs.docker.com/ai/sandboxes/ (opens in new tab)
- docs.docker.com/ai/sandboxes/architecture/ (opens in new tab)
- CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (opens in new tab)
- This product uses data from the NVD API but is not endorsed or certified by the NVD. (opens in new tab)
- Known Exploited Vulnerabilities catalog from CISA. (opens in new tab)
- EPSS scores from FIRST (Exploit Prediction Scoring System). (opens in new tab)