{"id":"CVE-2026-93320","aliases":["AZL-106806","EUVD-2026-92539","GHSA-9728-qjrv-2xh2","UBUNTU-CVE-2026-93320"],"status":"published","title":"BuildKit improperly handles special files in build snapshots","description":"BuildKit may be tricked into performing file actions with special file inodes where regular files are expected. Special files may block operations or, on rootful workers, allow unintended host device access.","severity":{"version":"4.0","score":6,"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:L/SC:N/SI:H/SA:H","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00114,"percentile":0.01476,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-441"],"published":"2026-10-05T17:50:44Z","modified":"2026-11-05T05:40:51Z","affected":[{"source":"osv","ecosystem":"Azure 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:26.04:LTS","package":"docker.io","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["26.1.5+dfsg1-9ubuntu1","27.5.1+dfsg4-1ubuntu1","27.5.1+dfsg4-2ubuntu1"]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"docker.io-app","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["28.2.2-0ubuntu1","29.1.2-0ubuntu1","29.1.3-0ubuntu1","29.1.3-0ubuntu2","29.1.3-0ubuntu3","29.1.3-0ubuntu4","29.1.3-0ubuntu4.1"]}],"products":[{"vendor":"moby","product":"buildkit"}],"references":[{"url":"https://github.com/moby/buildkit/security/advisories/GHSA-9728-qjrv-2xh2","tags":["vendor-advisory","advisory","report"]},{"url":"https://github.com/moby/buildkit/releases/tag/v0.33.1","tags":["patch","fix"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-93320","tags":["web","advisory"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/93xxx/CVE-2026-93320.json","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-93320","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-93320","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2026-93320","title":"BuildKit improperly handles special files in build snapshots","description":"BuildKit may be tricked into performing file actions with special file inodes where regular files are expected. Special files may block operations or, on rootful workers, allow unintended host device access.","status":"published","published":"2026-10-05T17:50:44.195Z","modified":"2026-10-05T18:52:25.223Z","cvss":[{"version":"4.0","score":6,"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:L/SC:N/SI:H/SA:H","level":"medium","assessor":"cna"}],"cwes":["CWE-441"],"updated_at":"2026-11-02T14:19:54.122945Z"}],"euvd":[{"id":"EUVD-2026-92539","description":"BuildKit may be tricked into performing file actions with special file inodes where regular files are expected. Special files may block operations or, on rootful workers, allow unintended host device access.","status":"published","published":"2026-10-05T17:50:44Z","modified":"2026-10-05T18:52:25Z","cvss":[{"version":"4.0","score":6,"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:L/SC:N/SI:H/SA:H","level":"medium"}],"updated_at":"2026-11-02T17:27:39.384414Z"}],"nvd":[{"id":"CVE-2026-93320","description":"BuildKit may be tricked into performing file actions with special file inodes where regular files are expected. Special files may block operations or, on rootful workers, allow unintended host device access.","status":"published","published":"2026-10-05T18:17:38.353Z","modified":"2026-10-06T15:08:38.397Z","cvss":[{"version":"4.0","score":6,"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:L/SC:N/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":"medium","assessor":"secondary"}],"cwes":["CWE-441"],"updated_at":"2026-11-02T14:12:54.129949Z"}],"osv":[{"id":"CVE-2026-93320","title":"BuildKit improperly handles special files in build snapshots","description":"BuildKit may be tricked into performing file actions with special file inodes where regular files are expected. Special files may block operations or, on rootful workers, allow unintended host device access.","status":"published","published":"2026-10-05T17:50:44.195Z","modified":"2026-10-28T02:30:52.12367155Z","cvss":[{"version":"4.0","score":6,"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:L/SC:N/SI:H/SA:H","level":"medium"}],"cwes":["CWE-441"],"updated_at":"2026-11-02T15:45:20.931171Z"},{"id":"UBUNTU-CVE-2026-93320","description":"BuildKit may be tricked into performing file actions with special file inodes where regular files are expected. Special files may block operations or, on rootful workers, allow unintended host device access.","status":"published","published":"2026-10-05T18:17:00Z","modified":"2026-10-17T13:01:18.242684333Z","cvss":[{"version":"4.0","score":6,"vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:L/SC:N/SI:H/SA:H","level":"medium"}],"updated_at":"2026-11-02T16:57:44.071534Z"},{"id":"AZL-106806","title":"CVE-2026-93320 affecting package moby-engine 25.0.18-1","description":"BuildKit may be tricked into performing file actions with special file inodes where regular files are expected. Special files may block operations or, on rootful workers, allow unintended host device access.","status":"published","published":"2026-10-05T18:17:38Z","modified":"2026-11-05T05:40:51Z","updated_at":"2026-11-05T16:41:17.969374Z"}]}}