---
id: CVE-2026-111923
title: Fleet before 4.89.0 Unauthenticated DoS via Apple MDM Enrollment Plist Parsing
summary: >-
  Fleet before 4.89.0 contains an unbounded recursion vulnerability in Apple MDM
  enrollment property list parsing that allows unauthenticated attackers to
  crash the server. Attackers can send a crafted binary plist payload of about
  150 byt…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
cvssSource: cna
cwe:
  - CWE-674
vendor: fleetdm
product: fleet
affected:
  - fleet < 4.89.0
published: '2026-10-17'
updated: '2026-10-17'
sourceUpdated: '2026-10-17T18:46:36.681Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-111923'
references:
  - url: 'https://github.com/fleetdm/fleet/security/advisories/GHSA-x467-vgxf-2g6h'
    label: GitHub Security Advisory (GHSA-x467-vgxf-2g6h)
  - url: >-
      https://www.vulncheck.com/advisories/fleet-before-4.89.0-unauthenticated-dos-via-apple-mdm-enrollment-plist-parsing
    label: >-
      VulnCheck Advisory: Fleet before 4.89.0 Unauthenticated DoS via Apple MDM
      Enrollment Plist Parsing
tags:
  - cve.org
ingestedAt: '2026-10-17T19:08:56.592Z'
---

## Overview

Fleet before 4.89.0 contains an unbounded recursion vulnerability in Apple MDM enrollment property list parsing that allows unauthenticated attackers to crash the server. Attackers can send a crafted binary plist payload of about 150 bytes to the enrollment endpoints, triggering exponential allocation or infinite recursion that exhausts CPU and memory.

## Affected

- `fleet < 4.89.0`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.