# CVE-2026-34388

## Summary

- **CVE ID:** CVE-2026-34388
- **Severity:** MEDIUM
- **CVSS Score:** 6.6 (CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U)
- **CWE:** CWE-703
- **Published:** Mar 27, 2026
- **Last Modified:** Mar 31, 2026

## Description

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.

## Affected Products

- fleetdm — fleet (< 4.81.0)

## References

- [CNA](https://github.com/fleetdm/fleet/security/advisories/GHSA-w254-4hp5-7cvv)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.26%
- **EPSS Percentile:** 18.0

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._