{"id":"CVE-2026-77179","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-77179","generatedAt":"2026-09-20T15:04:45.299Z","title":"On macOS, the virtio-fs host server used by Docker Sandboxes improperly follows symlinks when reopening an unlinked file from a stored path.","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.","published":"2026-09-15T14:17:11.000Z","lastModified":"2026-09-16T20:38:34.000Z","status":"Awaiting Analysis","sourceIdentifier":"security@docker.com","cvss":{"version":"4.0","score":9.4,"severity":"CRITICAL","vector":"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M"},"cwe":["CWE-59"],"affected":[],"epss":{"score":0.0016,"percentile":0.05608,"date":"2026-09-19","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.16%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"https://docs.docker.com/ai/sandboxes/","source":"security@docker.com"},{"url":"https://docs.docker.com/ai/sandboxes/security/isolation/","source":"security@docker.com"},{"url":"https://github.com/docker/sbx-releases/releases/tag/v0.42.0","source":"security@docker.com"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-77179","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}