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TI-2026-22159 Aliases CVE-2026-27806GHSA-rphv-h674-5hp2

Fleet Affected by Local Privilege Escalation via Tcl Command Injection in Orbit

Priority LOW 35CWE-78Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-78.

Summary

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 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. This vulnerability is fixed in 4.81.1.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00115 1st percentileScored 2026-11-07
Fix Fixed fleet (fleetdm): 4.81.1github.com/fleetdm/fleet/v4 (Go): 4.81.1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
fleetdmfleetbefore 4.81.14.81.1Patch availableCNA
—github.com/fleetdm/fleet/v4 (Go)before 4.81.14.81.1Patch availableGHSA-rphv-h674-5hp2
  • fleet Vendorfleetdm Affected before 4.81.1 Fixed in 4.81.1 Patch available CNA
  • github.com/fleetdm/fleet/v4 (Go) Vendor— Affected before 4.81.1 Fixed in 4.81.1 Patch available GHSA-rphv-h674-5hp2

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:fleetdm:fleet:*:*:*:*:*:*:*:*before 4.81.1Vulnerablefleetdm
  • cpe:2.3:a:fleetdm:fleet:*:*:*:*:*:*:*:* Versions before 4.81.1 Vulnerable ·fleetdm

Remediation

  • Fix · CNA fleet (fleetdm) Fixed in 4.81.1
  • Fix · GHSA-rphv-h674-5hp2 github.com/fleetdm/fleet/v4 (Go) Fixed in 4.81.1 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-27806
  2. 2026-10-03 Alias added: GHSA-rphv-h674-5hp2

References

Advisory 1

Other 1

  • TI-2026-65639 Fleet before 4.87.0 Authentication Bypass via Device Identifiers CVSS 4.0CRITICAL 9.3
  • TI-2026-18942 Fleet has a JWT signature bypass vulnerability in Azure AD MDM enrollment CVSS 4.0CRITICAL 9.3
  • TI-2020-16097 SAML authentication vulnerability in Fleet CVSS 3.1CRITICAL 10.0
  • TI-2026-21066 Fleet server may terminate unexpectedly when handling certain gRPC requests CVSS 4.0HIGH 8.7
  • TI-2026-21065 Fleet's unbounded request body read allows remote Denial of Service CVSS 4.0HIGH 8.7
  • TI-2026-20084 Fleet Windows MDM Azure AD JWT Authentication Bypass CVSS 4.0HIGH 8.2
See all 31 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences