CVE-2026-34386 Fleet vulnerable to SQL injection in MDM bootstrap package by authenticated team or global admin

What is CVE-2026-34386?

CVE-2026-34386 is a medium-severity SQL injection vulnerability in fleetdm fleet, published on 27 Mar 2026. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

Fleet is open source device management software. Prior to 4.81.0, a SQL injection vulnerability in Fleet's MDM bootstrap package configuration allows an authenticated user with Team Admin or Global Admin privileges to modify arbitrary team configurations, exfiltrate sensitive data from the Fleet database, and inject arbitrary content into team configs via direct API calls. Version 4.81.0 patches the issue.

Weakness: CWE-89

Which versions are affected by CVE-2026-34386?

3 open source packages ship an affected version, including github.com/fleetdm/fleet/v4. It affects 1 product.

Products include Fleetdm Fleet.

How do I fix CVE-2026-34386?

Upgrade github.com/fleetdm/fleet/v4 to 4.81.0 or later.

Use parameterised queries everywhere and never build SQL by joining strings. Upgrade affected software first; a web application firewall only buys time. More about SQL injection.

Is CVE-2026-34386 being exploited?

There is no known exploitation of CVE-2026-34386 in the wild and no public exploit code.

Other vulnerabilities in fleetdm fleet

• CVE-2020-26276 SAML authentication vulnerability in Fleet Critical 10.0
• CVE-2026-103264 Fleet before 4.87.0 Authentication Bypass via Device Identifiers Critical 9.3
• CVE-2026-23518 Fleet has a JWT signature bypass vulnerability in Azure AD MDM enrollment Critical 9.3
• CVE-2026-26062 Fleet server may terminate unexpectedly when handling certain gRPC requests High 8.7
• CVE-2026-26061 Fleet's unbounded request body read allows remote Denial of Service High 8.7

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-9p23-p2m4-2r4m, GO-2026-4913.