Vulnerability in Docker Sandboxes
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.
Published · last modified .
EPSS exploit prediction
EPSS: 0.002 (9.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 10th percentile — 9.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000
Affected products
Weakness classification (CWE)
Public proof-of-concept exploits
References
- docs.docker.com/ai/sandboxes/ (product)
- docs.docker.com/ai/sandboxes/security/isolation/ (product)
- github.com/docker/sbx-releases/releases/tag/v0.41.0 (release-notes)
- github.com/docker/sbx-releases/releases/tag/v0.42.0 (release-notes)
Frequently asked questions
- What is CVE-2026-77179?
- CVE-2026-77179 is a vulnerability in Docker Sandboxes, classified under Improper Link Resolution Before File Access. Published 2026-09-15.
- Is CVE-2026-77179 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.