What’s Vulnerable › Vulnerabilities
CVE-2026-34389: Fleet's user account creation via invite does not enforce invited email address
- Severity: medium (CVSS 6.5 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.2% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-03-27 · updated 2026-10-26
- Weakness: CWE-287
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.
Affected products
- fleetdm fleet: before 4.81.1 — fixed in 4.81.1
How to fix
Upgrade to a fixed version: fleetdm fleet 4.81.1. Check the vendor advisory for mitigations.
References
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