CVE-2026-34388 — Fleet is open source device management software. Prior to 4.81.0, a…
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🚨 CVE-2026-34388 Fleet is open source device management software. Prior to 4.81.0, a denial-of-service vulnerability in Fleet's gRPC Launcher endpoint allows an authenticated host to crash the entire Fleet server process by sending an unexpected log type value. The server terminates immediately, disrupting all connected hosts, MDM enrollments, and API consumers. Version 4.81.0 patches the issue.
What This Means For You
- New vulnerability disclosed — verify if your stack is exposed.
- New tool or resource available — evaluate for your security workflow.
Indicators of Compromise
| ID | Type | Indicator |
|---|---|---|
| CVE-2026-34388 | DoS | Fleet < 4.81.0 gRPC Launcher endpoint |
| CVE-2026-34388 | DoS | Fleet 4.81.0 |
Source & Attribution
| Source Platform | Telegram |
| Channel | CVE Notify |
| Channel ID | 1129491012 |
| Message ID | 157772 |
| Published | April 02, 2026 at 22:56 UTC |
| Original Link | https://github.com/fleetdm/fleet/security/advisories/GHSA... |
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