CVE-2026-101045

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.

• CWE-78

• https://github.com/fleetdm/fleet/security/advisories/GHSA-fv3p-h7wv-2jgm
• https://www.vulncheck.com/advisories/fleet-homebrew-cask-os-command-injection-via-metadata

Published

Sep 27, 2026

Last Modified

Sep 28, 2026

Status

Received

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2026-10104The Product Video Gallery for Woocommerce plugin for WordPre…4.4
• CVE-2026-101040A security flaw has been discovered in Ricoh SP 330DN, SP 22…6.5
• CVE-2026-101041The account recovery (password reset) functionality in the v…6.3
• CVE-2026-101042Parse Server is an open-source backend server. In versions >…6.4
• CVE-2026-101043pnpm versions 11.0.0 before 11.11.0 and 10.7.0 before 10.34.…7.4
• CVE-2026-101044pacquet, the Rust package-manager component shipped in the p…7.1
• CVE-2026-101046Fleet before 4.89.0 contains an SQL injection vulnerability …3.1
• CVE-2026-101047Fleet before 4.87.0 does not protect the two endpoints that …5.3
• CVE-2026-101048Cloudreve before 4.17.0 registers the administrative node te…5.4
• CVE-2026-101049Heym before 0.0.53 fails to verify Slack request signatures …6.5
• CVE-2026-10105agno 2.6.5 contains a SQL injection vulnerability in the Cli…8.7
• CVE-2026-101050Heym before 0.0.53 fails to verify the X-Telegram-Bot-Api-Se…6.5