What is CVE-2026-34388?

CVE-2026-34388 is a high-severity vulnerability in Fleetdm Fleet, classified under CWE-703. CVSS score: 7.5/10. Published 2026-03-27.

How severe is CVE-2026-34388?

High severity. CVSS v3 base score is 7.5 out of 10.

Vulnerability in Fleetdm Fleet

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 v…

EPSS: 0.003 (17.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Fleetdm Fleet — versions < 4.81.0

Weakness classification (CWE)

CWE-703

References

security-advisories@github.com (x_refsource_CONFIRM, Vendor Advisory)

Frequently asked questions

What is CVE-2026-34388?: CVE-2026-34388 is a high-severity vulnerability in Fleetdm Fleet, classified under CWE-703. CVSS score: 7.5/10. Published 2026-03-27.
How severe is CVE-2026-34388?: High severity. CVSS v3 base score is 7.5 out of 10.