CVE-2026-34388CWE-703

Fleet vulnerable to Denial of Service via unhandled gRPC log type in launcher endpoint

Medium · published March 27, 2026

CVSS v4.0
6.6
EPSS
0%
Percentile
38.9
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
6.6 · MEDIUM
Vector
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
EPSS
0.00460 · 38.9th percentile
Weakness
CWE-703 · Improper Check or Handling of Exceptional Conditions
Published
2026-03-27T19:13Z
EPSS history
Timeline
  • 27 MAR 19:13Z
    Fleet vulnerable to Denial of Service via unhandled gRPC log type in launcher endpoint
    cvelistv5