CVE-2026-34389 MEDIUM

CVE-2026-34389: Fleet's user account creation via invite does not enforce invited email address

Vendor Fleetdm
Product fleet
Weakness CWE-287 · Improper authentication
Published March 27, 2026
Last update March 30, 2026
View on NVD All CVEs

CVSS base score

4.9/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality —
Integrity —

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:U

What the vulnerability does

01Description

Fleet is open source device management software. Prior to 4.81.0, Fleet contained an issue in the user invitation flow where the email address provided during invite acceptance was not validated against the email address associated with the invite. An attacker who obtained a valid invite token could create an account under an arbitrary email address while inheriting the role granted by the invite, including global admin. Version 4.81.0 patches the issue.

Key dates

02Disclosure timeline

March 27, 2026 CVE published
March 30, 2026 Record updated