CVE-2026-77179

Description

On macOS, the virtio-fs host server used by Docker Sandboxes improperly follows symlinks when reopening an unlinked file from a stored path. A malicious guest can replace a parent directory with a symlink, escape the shared workspace, and read or modify arbitrary host files as the VMM user, potentially achieving host code execution.

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Weakness Type (CWE)

CWE-59 CWE-59

References

Other References

https://docs.docker.com/ai/sandboxes/ https://docs.docker.com/ai/sandboxes/security/isolation/ https://github.com/docker/sbx-releases/releases/tag/v0.42.0

Frequently Asked Questions

What is CVE-2026-77179? +

On macOS, the virtio-fs host server used by Docker Sandboxes improperly follows symlinks when reopening an unlinked file from a stored path. A malicious guest can replace a parent directory with a symlink, escape the shared workspace, and read or modify arbitrary host files as the VMM user, potentially achieving host code execution.

How do I check if I'm vulnerable to CVE-2026-77179? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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