How severe is CVE-2026-34386?

CVE-2026-34386 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-34386 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (25th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-34386?

CVE-2026-34386 affects Fleetdm Fleet. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-34386?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-34386 have an EU (EUVD) identifier?

Yes. CVE-2026-34386 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-16756.

When was CVE-2026-34386 published?

CVE-2026-34386 was published on 2026-03-27 and last updated on 2026-06-17.

CVE-2026-34386

CVE-2026-34386 is a high-severity vulnerability in Fleetdm Fleet with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-89.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v4: 6.3
EPSS exploit prediction: 0% (25th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-16756
Weakness: CWE-89
Affected product: Fleetdm Fleet
Published: 2026-03-27
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2026-34386?: 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.
How severe is CVE-2026-34386?: CVE-2026-34386 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-34386 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (25th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-34386?: CVE-2026-34386 affects Fleetdm Fleet. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-34386?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-34386 have an EU (EUVD) identifier?: Yes. CVE-2026-34386 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-16756.
When was CVE-2026-34386 published?: CVE-2026-34386 was published on 2026-03-27 and last updated on 2026-06-17.

References

https://github.com/fleetdm/fleet/security/advisories/GHSA-9p23-p2m4-2r4m

Affected products (1)

cpe:2.3:a:fleetdm:fleet:*:*:*:*:*:*:*:*

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