CVE-2026-34389

Fleet's user account creation via invite does not enforce invited email address

State: Published
Severity: 4.9 Medium
Published: Mar 27, 2026
Updated: Mar 30, 2026
Reserved: Mar 27, 2026

Description

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.

Scores

CVSS	Score	Vector	Source
4.0	4.9 Medium	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	GitHub_M

Weaknesses

CWE-287 Improper Authentication

Affected Products

Product	Versions
fleetfleetdm	< 4.81.0Affected

References

https://github.com/fleetdm/fleet/security/advisories/GHSA-4f9r-x588-pp2h

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