CVE-2026-18171— Docker Sandboxes read-only runtime mount writable through its shared-export alias
Possible ATT&CK Techniques 1AI
T1135 · Network Share DiscoveryAffected Version Matrix 1
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Docker | Docker Sandboxes | 0.35.0≤ 0.38.0 | affected |
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I. Basic Information for CVE-2026-18171
Vulnerability Information
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Vulnerability Title
Docker Sandboxes read-only runtime mount writable through its shared-export alias
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制不正确
Source: CVE Program / CVE List V5
Vulnerability Title
Docker Sandboxes 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Docker Sandboxes是美国Docker公司的一个容器沙箱隔离环境。 Docker Sandboxes 0.35.0版本至0.38.0版本存在授权问题漏洞，该漏洞源于仅将运行时主机挂载的只读意图应用于客户机容器绑定，底层virtio-fs主机边缘授权被添加到沙箱策略共享允许列表且未设置访问模式，可能导致沙箱内非特权代码向只读挂载的主机目录写入数据。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Docker | Docker Sandboxes | 0.35.0 ~ 0.38.0 | cpe:2.3:a:docker:docker_sandboxes:*:*:*:*:*:*:*:* |
II. Public POCs for CVE-2026-18171
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Pages for CVE-2026-18171 (2)
- 🔗 Architecture | Docker Docsproduct
IV. Related Vulnerabilities
Same vendor: Docker
- CVE-2026-12539
Docker Sandboxes ICMP egress restriction bypass after daemon - CVE-2026-12039
Docker Sandboxes network egress allowlist bypass via unfilte - CVE-2026-8936
Unbounded recursion in grpcfuse kernel module allows contain - CVE-2026-5843
Docker Model Runner container-to-host code execution via MLX - CVE-2026-5817
Docker Model Runner container-to-host code execution via uns
Same weakness: CWE-863
V. Comments for CVE-2026-18171
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