{"id":"CVE-2026-101045","revision":"d4dea1c3aeac42aeb0b5e3ba8e67fc6e","records":[{"revision":"d4dea1c3aeac42aeb0b5e3ba8e67fc6e","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-101045","aliases":[],"title":"Fleet Homebrew Cask OS Command Injection via Metadata","description":"Fleet-maintained app install and uninstall scripts for macOS are generated from Homebrew cask metadata. In manifests generated before 2026-08-19, the script generator escaped this metadata at some interpolation sites but not all of them, so cask metadata containing shell metacharacters (for example $(...) command substitution) could be carried into scripts that execute as root on managed macOS hosts. An attacker who could land crafted metadata in an upstream Homebrew cask — without needing any Fleet credentials — could achieve arbitrary command execution as root on managed macOS hosts that install or uninstall the affected Fleet-maintained app; exploitation required the crafted metadata to pass both upstream Homebrew cask review and Fleet's review of the automated ingestion pull request. The fix (fleetdm/fleet#51324) landed in Fleet's ingestion pipeline on 2026-08-19 so that all manifests generated on or after that date escape cask metadata at every interpolation site; because manifests are generated centrally and distributed as pre-built content, remediation applied to all deployments with no customer action, and the code fix is included in Fleet v4.92.0.","state":0,"publishedAt":"2026-09-27T17:02:34.472+00:00","modifiedAt":"2026-09-30T17:20:13.569+00:00","affected":[{"ecosystem":"Vendor product","name":"fleet","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"fleetdm\",\n                    \"product\": \"fleet\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"versions\": [\n                        {\n                            \"version\": \"0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"custom\",\n                            \"lessThan\": \"2026-08-19\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H","score":8.9,"severity":"HIGH"},{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H","score":8,"severity":"HIGH"}],"references":["https://github.com/fleetdm/fleet/security/advisories/GHSA-fv3p-h7wv-2jgm","https://www.vulncheck.com/advisories/fleet-homebrew-cask-os-command-injection-via-metadata"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-101045","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-101045","identifiers":["CVE-2026-101045"]},"retained":false,"historicalAffected":[]}],"coverage":[]}