Tcl/Tk 8.6.14 is out today: https://sourceforge.net/p/tcl/mailman/tcl-core/thread/SA1PR09MB887585E09B30AE57F0E7F2E3865F2%40SA1PR09MB8875.namprd09.prod.outlook.com/#msg58743251

I will open a few PRs for these shortly: one here for the macOS installer, and others at cpython-source-deps for Windows:
python/cpython-source-deps#33
python/cpython-source-deps#34

There is still a known test failure with Tk 8.6.14 which I have neglected: gh-107262

Linked PRs

• gh-116145: Update macOS installer to Tcl/Tk 8.6.14 #116151
• gh-116145: Updated bundled Tcl/Tk on Windows to 8.6.14 #117030
• [3.13] gh-116145: Updated bundled Tcl/Tk on Windows to 8.6.14 (GH-117030) #119847
• [3.12] gh-116145: Update macOS installer to Tcl/Tk 8.6.14 (GH-116151) #119922
• [3.12] gh-116145: Updated bundled Tcl/Tk on Windows to 8.6.14 (GH-117030) #120396