Improper Check or Handling of Exceptional Conditions Affecting github.com/fleetdm/fleet/server/launcher package, versions <4.81.0
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-GOLANG-GITHUBCOMFLEETDMFLEETSERVERLAUNCHER-15825740
- published30 Mar 2026
- disclosed27 Mar 2026
- creditfuzzztf
Introduced: 27 Mar 2026
CVE-2026-34388 Â (opens in a new tab)How to fix?
Upgrade github.com/fleetdm/fleet/server/launcher to version 4.81.0 or higher.
Overview
Affected versions of this package are vulnerable to Improper Check or Handling of Exceptional Conditions via the launcher endpoint when an authenticated host sends an unexpected log type value. An attacker can cause the server process to terminate immediately, disrupting all connected hosts, MDM enrollments, and API consumers by sending specially crafted gRPC requests.