{"id":"CVE-2026-77179","aliases":["EUVD-2026-78467","GHSA-4x2g-7mfh-8rx6"],"status":"published","title":"Docker Sandboxes guest can write arbitrary macOS host files via a symlink in the virtio-fs stored-path fallback","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.","severity":{"version":"4.0","score":9.4,"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","level":"critical","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00199,"percentile":0.09791,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":false},"cwes":["CWE-59"],"published":"2026-09-15T13:32:41Z","modified":"2026-10-28T02:30:28Z","exploits":[{"source":"pocgithub","id":"HORKimhab/CVE-2026-77179","title":"HORKimhab/CVE-2026-77179","date":"2026-09-18","url":"https://github.com/HORKimhab/CVE-2026-77179"}],"products":[{"vendor":"docker","product":"docker sandboxes"}],"references":[{"url":"https://docs.docker.com/ai/sandboxes/","tags":["product","web"]},{"url":"https://docs.docker.com/ai/sandboxes/security/isolation/","tags":["product","web"]},{"url":"https://github.com/docker/sbx-releases/releases/tag/v0.42.0","tags":["release-notes","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-77179","tags":["advisory"]},{"url":"https://docs.docker.com/ai/sandboxes"},{"url":"https://docs.docker.com/ai/sandboxes/security/isolation"},{"url":"https://github.com/docker/sbx-releases/releases/tag/v0.41.0"},{"url":"https://github.com/advisories/GHSA-4x2g-7mfh-8rx6"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/77xxx/CVE-2026-77179.json","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2026-77179","title":"Docker Sandboxes guest can write arbitrary macOS host files via a symlink in the virtio-fs stored-path fallback","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.","status":"published","published":"2026-09-15T13:32:41.132Z","modified":"2026-09-15T21:43:07.049Z","cvss":[{"version":"4.0","score":9.4,"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","level":"critical","assessor":"cna"}],"cwes":["CWE-59"],"updated_at":"2026-11-02T14:20:15.712761Z"}],"euvd":[{"id":"EUVD-2026-78467","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.","status":"published","published":"2026-09-15T13:32:41Z","modified":"2026-09-15T21:43:07Z","cvss":[{"version":"4.0","score":9.4,"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","level":"critical"}],"updated_at":"2026-11-02T17:28:16.983725Z"}],"ghsa":[{"id":"GHSA-4x2g-7mfh-8rx6","title":"On macOS, the virtio-fs host server used by Docker Sandboxes improperly follows symlinks when...","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.","status":"published","published":"2026-09-15T15:32:11Z","modified":"2026-09-16T00:32:25Z","cvss":[{"version":"4.0","score":9.4,"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/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"critical"}],"cwes":["CWE-59"],"updated_at":"2026-11-02T15:11:57.004249Z"}],"nvd":[{"id":"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.","status":"published","published":"2026-09-15T14:17:11.273Z","modified":"2026-09-16T20:38:33.883Z","cvss":[{"version":"4.0","score":9.4,"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/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"critical","assessor":"secondary"}],"cwes":["CWE-59"],"updated_at":"2026-11-02T14:12:47.668237Z"}],"osv":[{"id":"CVE-2026-77179","title":"Docker Sandboxes guest can write arbitrary macOS host files via a symlink in the virtio-fs stored-path fallback","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.","status":"published","published":"2026-09-15T13:32:41.132Z","modified":"2026-10-28T02:30:28.287819135Z","cvss":[{"version":"4.0","score":9.4,"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","level":"critical"}],"cwes":["CWE-59"],"updated_at":"2026-11-02T15:45:17.102988Z"}]}}