CVE Catalog

CVE-2026-101045

HighCVSS 8.0
Published: Updated: Translated: NVD NIST

Exploitation Probability (EPSS)

Elevated risk
0.75%

53th percentile - higher than 53% of all known CVEs

Summary

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, allowing cask metadata containing shell metacharacters to be carried into scripts that execute as root. An attacker who could land crafted metadata in an upstream Homebrew cask could achieve arbitrary command execution as root on managed macOS hosts.

Risk Assessment

Risk of full compromise of managed macOS hosts by an unauthenticated attacker, potentially leading to data theft, malware installation, or disruption.

Recommendation

Upgrade Fleet to version 4.92.0 or later, which includes the fix. Ensure all manifests generated after 2026-08-19 are in use.

Other vulnerabilities in Fleet

See all
Original NVD description (English source)

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.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS