Vulnerability in Fleetdm Fleet
CVE-2026-23518
Fleet is open source device management software. In versions prior to 4.78.3, 4.77.1, 4.76.2, 4.75.2, and 4.53.3, a vulnerability in Fleet's Windows MDM enrollment flow could allow an attacker to submit forged authentication tokens that ar…
EPSS: 0.002 (13.2th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Fleetdm Fleet — versions >= 4.75.0, < 4.75.2, >= 4.77.0, < 4.77.1, >= 4.78.0, < 4.78.3
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Vendor Advisory)
- security-advisories@github.com (Patch, x_refsource_MISC)
Frequently asked questions
- What is CVE-2026-23518?
- CVE-2026-23518 is a critical-severity vulnerability in Fleetdm Fleet, classified under Improper Verification of Cryptographic Signature. CVSS score: 9.8/10. Published 2026-01-21.
- How severe is CVE-2026-23518?
- Critical severity. CVSS v3 base score is 9.8 out of 10.