Configurations behind a reverse proxy that did not explicitly configure trusted proxies will not work after this release. This was never a supported configuration, so please ensure you correct your configuration before upgrading. See the updated docs here for more information.
Security
Fix validation of API parameters to FFmpeg [GHSA-2c3c-r7gp-q32m], by @Shadowghost
Fix trusting forward headers if none are configured [GHSA-qcmf-gmhm-rfv9], by @JPVenson
Note: GHSAs will be published seven (7) days after this release.
General Changes
Fix regression where "Search for missing metadata" not handling cast having multiple roles [PR #13720], by @Lampan-git
Clone fallback audio tags instead of use ATL.Track.set [PR #13694], by @gnattu
Backport 10.11 API enum changes [PR #13835], by @nielsvanvelzen
Support more rating formats [PR #13639], by @IDisposable
Fix stackoverflow in MediaSourceCount [PR #12907], by @JPVenson
Upgrade LrcParser to 2025.228.1 [PR #13659], by @congerh
Include Role and SortOrder in MergePeople to fix "Search for missing metadata" [PR #13618], by @Lampan-git
Delete children from cache on parent delete [PR #13601], by @Bond-009
Fix overwrite of PremierDate with a year-only value [PR #13598], by @IDisposable
Wait for ffmpeg to exit on Windows before we try deleting the concat file [PR #13593], by @Bond-009
Fix 4K filtering when grouping movies into collections [PR #13594], by @theguymadmax
Remove empty ParentIndexNumber workaround [PR #13611], by @Shadowghost
Update dependency z440.atl.core to 6.20.0 [PR #13845], by @Shadowghost