CVE-2026-48786: Fleet information disclosure in target search endpoint

CVE-2026-48786 · Severity: medium · CVSS 6.5 · Published 2026-08-26

Fleet, a platform used to manage and monitor fleets of computers, contained a security flaw where users with low-level 'Observer' or 'Technician' permissions could view sensitive configuration data they should not have access to. This exposed information includes 'enroll secrets' used to add new devices to the network and other credentials like AWS keys or proxy passwords. An attacker with these credentials could potentially enroll unauthorized devices into the corporate environment or gain access to connected cloud services.

Technologies: github.com/fleetdm/fleet/v4 (Go). Vendors: Go.

Quick answers

Is CVE-2026-48786 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-48786 being exploited in the wild.
How severe is CVE-2026-48786?
Medium severity, with a CVSS score of 6.5, published 26 August 2026.
Which products and versions are affected?
github.com/fleetdm/fleet/v4 (Go) < 4.87.0, SEMVER:introduced=0,fixed=4.87.0.
Is there a fix for CVE-2026-48786?
Yes. github.com/fleetdm/fleet/v4 (Go): upgrade to 4.87.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-48786 attacked?
It is attacked over the network, in a network appliance.
Am I affected by CVE-2026-48786?
Check whether you run github.com/fleetdm/fleet/v4 (Go) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • github.com/fleetdm/fleet/v4 (Go): upgrade to 4.87.0 or later
    go get github.com/fleetdm/fleet/v4@v4.87.0

Technical details

An information disclosure vulnerability (CWE-200) exists in Fleet's target search endpoint (POST /api/latest/fleet/targets). While other team-facing endpoints correctly mask sensitive fields for low-privileged users, this specific endpoint failed to sanitize team enroll secrets and team agent options. An authenticated attacker with Observer, Observer+, or Technician roles (global or team-scoped) can retrieve unmasked secrets by performing a target search against an observer-runnable query. This allows for the enrollment of unauthorized hosts or the theft of credentials stored in agent options, such as AWS secret access keys. The issue is resolved in version 4.87.0.

Affected products

  • Fleet Device Management (fleetdm) Fleet < 4.87.0

Identifiers

  • CVE-2026-48786
  • GHSA-88p2-jj8w-j8qg
  • GO-2026-6220

Timeline

  • 2026-06-19: patched: Release v4.87.0 made available.
  • 2026-08-11: disclosed: Initial advisory publication.

References

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