# CVE-2026-77179

## Summary

- **CVE ID:** CVE-2026-77179
- **Severity:** CRITICAL
- **CVSS Score:** 9.4 (CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H)
- **CWE:** CWE-59
- **Published:** Sep 15, 2026
- **Last Modified:** Sep 15, 2026

## 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.

## Affected Products

- Docker — Docker Sandboxes (0.28.0)

## References

- [CNA](https://docs.docker.com/ai/sandboxes/)
- [CNA](https://docs.docker.com/ai/sandboxes/security/isolation/)
- [CNA](https://github.com/docker/sbx-releases/releases/tag/v0.41.0)
- [CNA](https://github.com/docker/sbx-releases/releases/tag/v0.42.0)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.16%
- **EPSS Percentile:** 5.6

---
_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-18._