Update Release Notes

Author: dpiparo

README/ReleaseNotes/v626/index.md

@@ -1071,8 +1071,19 @@ The latest Apple operating sytstem supported is Monterey (macOS version 12).
 * [[#14458](https://github.com/root-project/root/issues/14458)] - Crash when doing Weighted Likelihood fit
 * [[#14508](https://github.com/root-project/root/issues/14508)] - Using LZMA compression with RNTupleWriter leads to memory corruption
 
-## HEAD of the v6-26-00-patches branch
+## Release 6.26/16
+
+Published on February 12, 2026
+
+### Bugs and Issues fixed in this release
 
-These changes will be part of a future 6.26/18.
+This release comes with some minor fixes, for example for TMVA nad platfornm support. Moreover, it addresses the following problems:
+
+* [[CVE-2026-24811]](https://nvd.nist.gov/vuln/detail/CVE-2026-24811)] and [[CVE-2026-24812]](https://nvd.nist.gov/vuln/detail/CVE-2026-24812)]
+* [[#16654](https://github.com/root-project/root/issues/16654)] - Cannot compile ROOT master with Ubuntu 24.10 with gcc 14 (Ubuntu 14.2.0-4ubuntu2)
+* [[#15590](https://github.com/root-project/root/issues/15590)] - Infinite recursion in TFile::Open
+* [[#14508](https://github.com/root-project/root/issues/14508)] - Using LZMA compression with RNTupleWriter leads to memory corruption
+
+## HEAD of the v6-26-00-patches branch
 
 - None so far.