What is CVE-2026-46356?

CVE-2026-46356 is a high-severity vulnerability in Fleetdm Fleet, classified under Authentication Bypass by Spoofing. CVSS score: 7.5/10. Published 2026-05-14.

How severe is CVE-2026-46356?

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

Vulnerability in Fleetdm Fleet

CVE-2026-46356

Fleet is open source device management software. Prior to version 4.80.1, a vulnerability in Fleet's IP extraction logic allows unauthenticated attackers to bypass API rate limiting by spoofing client IP headers. This may allow brute-force…

EPSS: 0.001 (24.3th 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:H/A:N.

Affected products

Fleetdm Fleet — versions < 4.80.1

Weakness classification (CWE)

CWE-290 — Authentication Bypass by Spoofing

References

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

Frequently asked questions

What is CVE-2026-46356?: CVE-2026-46356 is a high-severity vulnerability in Fleetdm Fleet, classified under Authentication Bypass by Spoofing. CVSS score: 7.5/10. Published 2026-05-14.
How severe is CVE-2026-46356?: High severity. CVSS v3 base score is 7.5 out of 10.