Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1336 CNY

100%
Buy Us a Coffee

CVE-2026-79994— Docker Sandboxes UDS forwarder can reach arbitrary host Unix sockets through a symlink race

Quick assessment

Affected
Docker Docker Sandboxes
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Docker 沙箱中，客户机到主机的 Unix 域套接字中继机制会验证套接字路径是否位于受信任的工作区内，但随后在重连时使用的是路径名。恶意的客户机可以在验证和实际连接之间的时间窗口内，将中间目录替换为符号链接，从而促使主机连接到共享工作区之外的任意 AF_UNIX 套接字。这可能导致目标套接字所暴露的数据或主机侧能力被泄露。

CVSS 8.7 · High EPSS 0.11% · P1

Affected Version Matrix 1

VendorProduct Version RangeStatus
Docker Docker Sandboxes 0.37.0< 0.42.0 affected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-79994

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
Docker Sandboxes UDS forwarder can reach arbitrary host Unix sockets through a symlink race
Source: CVE Program / CVE List V5
Vulnerability Description
The guest-to-host Unix-domain socket relay in Docker Sandboxes validates that a socket path is inside an authorized workspace, but later reconnects using the pathname. A malicious guest can replace an intermediate directory with a symlink between validation and connection, causing the host to connect to an arbitrary AF_UNIX socket outside the shared workspace. This can expose data or host-side capabilities provided by the targeted socket.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
检查时间与使用时间(TOCTOU)的竞争条件
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Docker Docker Sandboxes 0.37.0 ~ 0.42.0 cpe:2.3:a:docker:docker_sandboxes:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-79994

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-79994

请登录查看更多情报信息。

Patches & Fixes for CVE-2026-79994 (2)

Vendor Pages for CVE-2026-79994 (4)

Same Patch Batch · Docker · 2026-09-15 · 3 CVEs total

CVE-2026-77179 9.4 CRITICAL Docker Sandboxes guest can write arbitrary macOS host files via a symlink in the virtio-fs
CVE-2026-55887 8.7 HIGH MCP Gateway: Argument injection via OCI image label YAML in Docker MCP Gateway

IV. Related Vulnerabilities

Same product: Docker Sandboxes
Same vendor: Docker
Same weakness: CWE-367

V. Comments for CVE-2026-79994

No comments yet

Leave a comment