CVE-2026-18171
Docker Sandboxes read-only runtime mount writable through its shared-export alias
- State
- Published
- Severity
- 5.7 Medium
- Published
- Aug 12, 2026
- Updated
- Aug 12, 2026
- Reserved
- Jul 28, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 5.7 Medium | 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 | Docker |
Weaknesses
- CWE-863 Incorrect Authorization
Affected Products
| Product | Versions |
|---|---|
Docker SandboxesDocker |
|
References
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