User Impersonation Affecting github.com/fleetdm/fleet/server/platform/endpointer package, versions <4.80.1
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.
Do your applications use this vulnerable package?
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applications- Snyk IDSNYK-GOLANG-GITHUBCOMFLEETDMFLEETSERVERPLATFORMENDPOINTER-17220162
- published7 Jun 2026
- disclosed14 May 2026
- creditfuzzztf
Introduced: 14 May 2026
CVE-2026-46356 Â (opens in a new tab)How to fix?
Upgrade github.com/fleetdm/fleet/server/platform/endpointer to version 4.80.1 or higher.
Overview
Affected versions of this package are vulnerable to User Impersonation due to the reliance on client-supplied IP address headers such as X-Forwarded-For, X-Real-IP, and True-Client-IP. An attacker can circumvent per-IP rate limiting by supplying arbitrary values in these headers, causing the system to treat each request as originating from a different IP address and enabling increased brute-force or password-spraying attempts against authentication endpoints.