CVE-2026-34389
published 2026-03-27CVE-2026-34389: 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…
PriorityP341medium6.5CVSS 3.1
AVNACLPRLUINSUCNIHAN
EPSS
0.18%
8.2th percentile
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
3 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| fleetdm | fleet | < 4.81.0 | 4.81.0 |
| fleetdm | fleet | < 4.81.1 | 4.81.1 |
| github.com | fleetdm_fleet_v4 | >= 0 < 4.81.0 | 4.81.0 |
CVSS provenance
nvdv3.16.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
nvdv4.04.9MEDIUMCVSS: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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
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OSV
Fleet's user account creation via invite does not enforce invited email address in github.com/fleetdm/fleet
osv·2026-04-02
CVE-2026-34389 Fleet's user account creation via invite does not enforce invited email address in github.com/fleetdm/fleet
Fleet's user account creation via invite does not enforce invited email address in github.com/fleetdm/fleet
Fleet's user account creation via invite does not enforce invited email address in github.com/fleetdm/fleet
GHSA
Fleet's user account creation via invite does not enforce invited email address
ghsa·2026-03-30
CVE-2026-34389 [MEDIUM] CWE-287 Fleet's user account creation via invite does not enforce invited email address
Fleet's user account creation via invite does not enforce invited email address
### Summary
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.
### Impact
If an attacker gains access to a valid invite token, they can create a Fleet user account with an email address of their choosing while inheriting the invite’s assigned role and team memberships.
This issue:
- Requires possession of a valid invite token
- Does not bypass authentication controls beyond invite-based account creation
OSV
Fleet's user account creation via invite does not enforce invited email address
osv·2026-03-30
CVE-2026-34389 [MEDIUM] Fleet's user account creation via invite does not enforce invited email address
Fleet's user account creation via invite does not enforce invited email address
### Summary
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.
### Impact
If an attacker gains access to a valid invite token, they can create a Fleet user account with an email address of their choosing while inheriting the invite’s assigned role and team memberships.
This issue:
- Requires possession of a valid invite token
- Does not bypass authentication controls beyond invite-based account creation
No detection rules found.
No public exploits indexed.
2026-03-27
Published