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.
- CVSS 4.0
- 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 - CVSS 3.1
- 7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - EPSS
- 0.3% chance of exploitation in the next 30 days; higher than 19% of CVEs (scores of 2026-10-25)
- CWE
- CWE-703
- Published
- Modified
- Record from
- the NVD, synced
Affected
- fleetdm:fleet
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-w254-4hp5-7cvv | Go | github.com/fleetdm/fleet/v4 | <4.81.0 | 4.81.0 |
| GO-2026-4915 | Go | github.com/fleetdm/fleet/v4 | <4.81.0 | 4.81.0 |