{"id":"CVE-2026-79994","state":"PUBLISHED","title":"Docker Sandboxes UDS forwarder can reach arbitrary host Unix sockets through a symlink race","description":"The guest-to-host Unix-domain socket relay in Docker Sandboxes validates that a socket path is inside an authorized workspace, but later reconnects using the pathname. A malicious guest can replace an intermediate directory with a symlink between validation and connection, causing the host to connect to an arbitrary AF_UNIX socket outside the shared workspace. This can expose data or host-side capabilities provided by the targeted socket.","publishedAt":"2026-09-15T20:33:21.074Z","updatedAt":"2026-09-16T17:57:02.176Z","severity":{"score":8.7,"label":"High","version":"4.0","vector":"CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N","source":"Docker"},"assigner":"Docker","products":["Docker Docker Sandboxes"],"affected":[{"vendor":"Docker","product":"Docker Sandboxes","defaultStatus":"unaffected","versions":[{"version":"0.37.0","status":"affected","lessThan":"0.42.0","versionType":"semver"}],"cpes":["cpe:2.3:a:docker:docker_sandboxes:*:*:*:*:*:*:*:*"]}],"references":["https://docs.docker.com/ai/sandboxes/","https://docs.docker.com/ai/sandboxes/security/isolation/","https://github.com/docker/sailor/pull/2021","https://github.com/docker/sandboxes/pull/5342","https://github.com/docker/sbx-releases/releases/tag/v0.42.0"],"weaknesses":["CWE-367"],"ingestedAt":"2026-10-29T20:13:07.220Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/79xxx/CVE-2026-79994.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-79994","state":"PUBLISHED","datePublished":"2026-09-15T20:33:21.074Z","dateUpdated":"2026-09-16T17:57:02.176Z","assignerShortName":"Docker","assignerOrgId":"686469e6-3ff6-451b-ab8b-cf5b9e89401e","dateReserved":"2026-08-25T16:47:15.411Z"},"containers":{"cna":{"title":"Docker Sandboxes UDS forwarder can reach arbitrary host Unix sockets through a symlink race","descriptions":[{"lang":"en","value":"The guest-to-host Unix-domain socket relay in Docker Sandboxes validates that a socket path is inside an authorized workspace, but later reconnects using the pathname. 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This can expose data or host-side capabilities provided by the targeted socket."}],"affected":[{"vendor":"Docker","product":"Docker Sandboxes","defaultStatus":"unaffected","versions":[{"version":"0.37.0","status":"affected","lessThan":"0.42.0","versionType":"semver"}],"cpes":["cpe:2.3:a:docker:docker_sandboxes:*:*:*:*:*:*:*:*"]}],"references":[{"url":"https://docs.docker.com/ai/sandboxes/","tags":["product"]},{"url":"https://docs.docker.com/ai/sandboxes/security/isolation/","tags":["product"]},{"url":"https://github.com/docker/sailor/pull/2021","tags":["patch"]},{"url":"https://github.com/docker/sandboxes/pull/5342","tags":["patch"]},{"url":"https://github.com/docker/sbx-releases/releases/tag/v0.42.0","tags":["release-notes"]}],"metrics":[{"cvssV4_0":{"version":"4.0","vectorString":"CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N","baseScore":8.7,"baseSeverity":"HIGH","attackVector":"LOCAL","attackComplexity":"LOW","attackRequirements":"PRESENT","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"HIGH","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"HIGH","subIntegrityImpact":"HIGH","subAvailabilityImpact":"NONE","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-367","description":"CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition","lang":"en","type":"CWE"}]}],"providerMetadata":{"shortName":"Docker","orgId":"686469e6-3ff6-451b-ab8b-cf5b9e89401e","dateUpdated":"2026-09-15T21:38:20.957Z"},"credits":[{"lang":"en","type":"finder","value":"Jurre van Bergen of ThreatNotify"}],"impacts":[{"capecId":"CAPEC-132","descriptions":[{"lang":"en","value":"CAPEC-132 Symlink Attack"}]}],"source":{"discovery":"EXTERNAL"},"workarounds":[{"lang":"en","value":"Use --clone mode and avoid additional read-write host mounts: https://docs.docker.com/ai/sandboxes/usage/#clone-mode"}]},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-16T17:56:16.161335Z","id":"CVE-2026-79994","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-09-16T17:57:02.176Z"}}]}}}