# Fleet Server 8.19.15, 9.3.4, 9.4.0 Security Update (ESA-2026-41) **URL:** \ **Category:** Security Announcements\ **Created:** [July 1, 2026, 1:48pm UTC](https://discuss.elastic.co/t/fleet-server-8-19-15-9-3-4-9-4-0-security-update-esa-2026-41/387438 "2026-07-01T13:48:04Z")\ **Posts on this page:** 1\ **Showing post:** 1
**Author:** ![kruskall](https://avatars.discourse-cdn.com/v4/letter/k/ac91a4/32.png) [@kruskall](https://discuss.elastic.co/u/kruskall)\ **Post date:** [July 1, 2026, 1:48pm UTC](https://discuss.elastic.co/t/fleet-server-8-19-15-9-3-4-9-4-0-security-update-esa-2026-41/387438/1 "2026-07-01T13:48:04Z")
**Dependency on Vulnerable Third-Party Component in Fleet Server Leading to Denial of Service** Dependency on Vulnerable Third-Party Component (CWE-1395) exists in the Go standard library used by Fleet Server that could allow a remote attacker to cause denial of service by sending a specially crafted payload that triggers the known vulnerability CVE-2026-32283. **Affected Versions:** - 8.x: All versions from 8.0.0 up to and including 8.19.14 - 9.x: - All versions from 9.0.0 up to and including 9.3.3 **Affected Configurations:** - All configurations are affected. **Solutions and Mitigations:** The issue is resolved in Fleet Server versions 8.19.15, 9.3.4, and 9.4.0. **For Users that Cannot Upgrade:** **Self-Managed** - Restrict network-level access to Fleet Server to trusted hosts and IP ranges only. **Cloud** - Elastic Cloud Hosted deployments of Fleet Server are managed by Elastic. Contact Elastic Support if you require immediate assistance prior to the fix being applied. **Indicators of Compromise (IOC)** No specific indicators of compromise have been identified for this vulnerability. **Severity:** CVSSv3.1: High ( 7.5 ) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H **CVE ID:** CVE-2026-32283 **Problem Type:** CWE-1395 - Dependency on Vulnerable Third-Party Component --- _[View the full topic](https://discuss.elastic.co/t/fleet-server-8-19-15-9-3-4-9-4-0-security-update-esa-2026-41/387438)._