Fleet Affected by Local Privilege Escalation via Tcl Command Injection in Orbit
## Summary The Orbit agent's FileVault disk encryption key rotation flow on collects a local user's password via a GUI dialog and interpolates it directly into a Tcl/expect script executed via `exec.Command("expect", "-c", script)`. Because the password is inserted into Tcl brace-quoted `send {%s}`, a password containing `}` terminates the literal and injects arbitrary Tcl commands. Since Orbit runs as root, this allows a local unprivileged user to escalate to root privileges. ## CWE - **CWE-78**: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') - **CWE-94**: Improper Control of Generation of Code ('Code Injection') ## Impact - Local privilege escalation to root: Any unprivileged local user on a managed endpoint can execute arbitrary commands as root ## Credit This vulnerability was discovered and reported by [bugbunny.ai](https://bugbunny.ai).
describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2026-27806US | — | — | ||
Fleet is open source device management software. Prior to 4.81.1, the Orbit agent's FileVault disk encryption key rotation flow on collects a local user's password via a GUI dialog… | ||||
references
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