Host-escape and potential host code execution in Docker Desktop on macOS; Docker is widely used and this can compromise developer/CI hosts across organizations.
CVE-2026-77179
Docker macOS virtio-fs host escape enabling host code execution
Is CVE-2026-77179 being exploited?
Not confirmed. CVE-2026-77179 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked.
How severe is CVE-2026-77179?
CVE-2026-77179 is rated Critical with a CVSS score of 9.4. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-77179?
Yes. A fix has been recorded for CVE-2026-77179. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-77179 affect?
CVE-2026-77179 affects Docker Sandboxes (macOS), Docker Desktop (macOS), virtio-fs host server, VMM on macOS. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-77179?
Update Docker Sandboxes/Desktop to patched release; avoid running untrusted guests
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Malicious guest can escape shared workspace, follow symlinks to read/modify arbitrary host files as the VMM user and potentially execute code on the host.
Immediate action required
- affected>= 0.28.0 and < 0.42.0
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.