{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-77179","assignerOrgId":"686469e6-3ff6-451b-ab8b-cf5b9e89401e","state":"PUBLISHED","assignerShortName":"Docker","dateReserved":"2026-08-20T15:32:02.935Z","datePublished":"2026-09-15T13:32:41.132Z","dateUpdated":"2026-09-15T21:43:07.049Z"},"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","platforms":["MacOS"],"product":"Docker Sandboxes","vendor":"Docker","cpes":["cpe:2.3:a:docker:docker_sandboxes:*:*:*:*:*:*:*:*"],"versions":[{"version":"0.28.0","status":"affected","lessThan":"0.42.0","versionType":"semver"}]}],"credits":[{"lang":"en","type":"finder","value":"Oren Yomtov of accomplish.ai"}],"descriptions":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"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."}],"value":"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."}],"impacts":[{"capecId":"CAPEC-132","descriptions":[{"lang":"en","value":"CAPEC-132 Symlink Attack"}]}],"metrics":[{"cvssV4_0":{"version":"4.0","vectorString":"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","baseScore":9.4,"baseSeverity":"CRITICAL","attackVector":"LOCAL","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"HIGH","vulnAvailabilityImpact":"HIGH","subConfidentialityImpact":"HIGH","subIntegrityImpact":"HIGH","subAvailabilityImpact":"HIGH","Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","valueDensity":"NOT_DEFINED","vulnerabilityResponseEffort":"NOT_DEFINED","providerUrgency":"NOT_DEFINED","exploitMaturity":"NOT_DEFINED"},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-59","description":"CWE-59: Improper Link Resolution Before File Access ('Link Following')","lang":"en","type":"CWE"}]}],"providerMetadata":{"orgId":"686469e6-3ff6-451b-ab8b-cf5b9e89401e","shortName":"Docker","dateUpdated":"2026-09-15T21:43:07.049Z"},"references":[{"tags":["product"],"url":"https://docs.docker.com/ai/sandboxes/"},{"tags":["product"],"url":"https://docs.docker.com/ai/sandboxes/security/isolation/"},{"tags":["release-notes"],"url":"https://github.com/docker/sbx-releases/releases/tag/v0.42.0"}],"source":{"discovery":"EXTERNAL"},"title":"Docker Sandboxes guest can write arbitrary macOS host files via a symlink in the virtio-fs stored-path fallback","workarounds":[{"lang":"en","value":"Use --clone mode and avoid additional read-write host mounts: https://docs.docker.com/ai/sandboxes/usage/#clone-mode"}]},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-15T15:00:58.602243Z","id":"CVE-2026-77179","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-09-15T15:01:06.221Z"}}]}}