CVE-2026-23999
Medium · 5.5CVSS
5.5
EPSS
0.1%
Published
Feb 26, 2026
CISA due date
—
The record
Fleet is open source device management software. In versions prior to 4.80.1, Fleet generated device lock and wipe PINs using a predictable algorithm based solely on the current Unix timestamp. Because no secret key or additional entropy was used, the resulting PIN could potentially be derived if the approximate time the device was locked is known. Fleet’s device lock and wipe commands generate a 6-digit PIN that is displayed to administrators for unlocking a device. In affected versions, this PIN was deterministically derived from the current timestamp. An attacker with physical possession of a locked device and knowledge of the approximate time the lock command was issued could theoretically predict the correct PIN within a limited search window. However, successful exploitation is constrained by multiple factors: Physical access to the device is required, the approximate lock time must be known, the operating system enforces rate limiting on PIN entry attempts, attempts would need to be spread over, and device wipe operations would typically complete before sufficient attempts could be made. As a result, this issue does not allow remote exploitation, fleet-wide compromise, or bypass of Fleet authentication controls. Version 4.80.1 contains a patch. No known workarounds are available.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
|---|---|---|---|
| Go | github.com/fleetdm/fleet/v4 | 0 | 4.80.1 |
| openSUSE:Leap 15.6 | govulncheck-vulndb | 0 | 0.0.20260317T205859-150000.1.152.1 |
Related vulnerabilities
- GHSA-ppwx-5jq7-px2w Fleet: Device lock PIN can be predicted if lock time is known Same vulnerability
- GHSA-2v6m-6xw3-6467 Fleet: Sensitive Google Calendar credentials disclosed to low-privileged users Also affects github.com/fleetdm/fleet/v4
- GHSA-5jvp-m9h4-253h Fleet: Authorization Bypass in certificate template batch deletion for team administrators Also affects github.com/fleetdm/fleet/v4
- GHSA-9pm7-6g36-6j78 Fleet: Unauthenticated Android device disenrollment vulnerability via Pub/Sub endpoint Also affects github.com/fleetdm/fleet/v4
- GHSA-49xw-vfc4-7p43 Fleet has an SQL Injection vulnerability via backtick escape in ORDER BY parameter Also affects github.com/fleetdm/fleet/v4
- CVE-2026-24004 Fleet is open source device management software. Also affects github.com/fleetdm/fleet/v4
- CVE-2026-25963 Fleet is open source device management software. Also affects github.com/fleetdm/fleet/v4
- CVE-2026-27465 Fleet is open source device management software. Also affects github.com/fleetdm/fleet/v4