feat: Add release notes for Unraid OS 7.2.7

This release includes security updates, Docker updates, and WebGUI fixes, along with package refreshes for core system components.

Author: elibosley

docs/unraid-os/release-notes/7.2.7.md

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+# Release notes · Unraid OS 7.2.7
+
+# Version 7.2.7 2026-05-21
+
+This release focuses on security updates, Docker updates, and WebGUI fixes, along with package refreshes for core system components.
+
+For security-sensitive environments, upgrading is recommended.
+
+## Upgrading
+
+For step-by-step instructions, see [Updating Unraid](</unraid-os/updating-unraid/>). Questions about your [license](</unraid-os/troubleshooting/licensing-faq/>)?
+
+## Changes vs. [7.2.6](<%5BPREVIOUS_VERSION_LINK%5D>)
+
+### Security
+
+* Security updates for docker, nginx, glibc, jq, avahi, and glibc support libraries.
+
+### Containers / Docker
+
+* Docker 29.5.1
+* Docker VLAN containers keep their configured gateway after updates.
+* Docker container menus stay reachable on pages with many containers.
+
+### WebGUI / System
+
+* Connect version checks restored in the server plugin.
+
+### Linux kernel
+
+* kernel upgrade: 6.12.90-Unraid (CVE-2026-43490, CVE-2026-46333)
+* Performance regression affecting Docker-enabled systems and some USB 3.1 devices.
+
+#### **Updated Packages (11)**
+
+```
+↑ aaa_glibc-solibs: 2.42 → 2.43
+↑ avahi: 0.8-3_SBo_LT → 20260508_3737842-1_SBo (NVD: CVE-2023-38469, CVE-2023-38470, CVE-2023-38471, CVE-2023-38472, CVE-2023-38473)
+↑ curl: 8.19.0 → 8.20.0 (NVD: CVE-2026-4873, CVE-2026-5545, CVE-2026-5773, CVE-2026-6253, CVE-2026-6276, CVE-2026-6429, CVE-2026-7009, CVE-2026-7168)
+↑ docker: 29.3.1-1_LT → 29.5.1-1_LT
+↑ glibc: 2.42-2_LT → 2.43 (NVD: CVE-2025-15281, CVE-2026-0861, CVE-2026-0915)
+↑ gnutls: 3.8.12 → 3.8.13 (CVE-2026-33846)
+↑ jq: 1.6-1_SBo → 1.8.1-1_SBo (NVD: CVE-2024-53427, CVE-2025-9403)
+↑ libvirt-php: 0.5.8-8.3.29_LT → 0.5.8-8.3.31_LT
+↑ nginx: 1.27.2-1_SBo_LT → 1.30.1-1_SBo_LT (NVD: CVE-2025-53859, CVE-2026-1642, CVE-2026-27651, CVE-2026-27654, CVE-2026-27784, CVE-2026-28753, CVE-2026-28755, CVE-2026-32647, CVE-2026-40460, CVE-2026-40701, CVE-2026-42934, CVE-2026-42945, CVE-2026-42946)
+↑ php: 8.3.29-1_LT → 8.3.31-1_LT (NVD: CVE-2025-14179, CVE-2026-6722, CVE-2026-6735, CVE-2026-7258, CVE-2026-7259, CVE-2026-7261, CVE-2026-7262, CVE-2026-7568)
+↑ zfs: 2.3.4_6.12.82_Unraid-2_LT → 2.3.4_6.12.90_Unraid-2_LT
+```