6000.6.6f1

Supported · Released Oct 15, 2026 · Changeset d20c9ac777da · 10 release notes

Unity release page Release notes (markdown) Open in Unity Hub

60build score

Upgrade risk+35Net cleanup+14Live debt+11

cohort: Update/Supported (67)

How this number is computed

Composite = sum of sub_score × weight across six metrics. Sub-scores are percentile-rank(log1p(min(raw, p95))) within the Update/Supported cohort (67 releases). Sub-scores for lower-is-better metrics are flipped to 100 − percentile.

Sub-score	Formula	Raw	Clip	%ile	Weight	Score	Contrib
Breaking surface	(breaking_change + api_change) / total_notes	0	0	31	25%	69	17.4
Blocker rate	blockers / total_notes	0.060	0.060	34	15%	66	10.0
Mobile risk	mobile_known_issues / total_notes	0	0	24	10%	76	7.6
Fix density	fixes / total_notes	0.642	0.642	51	15%	51	7.7
Net-fix delta	((fixes − known_issues) − prior.(fixes − known_issues)) / total_notes	0.030	0.030	43	15%	43	6.4
Known-issue debt	known_issues / total_notes	0.149	0.149	44	20%	56	11.2
Composite							60

* = raw value was clipped at the cohort 95th percentile to prevent outliers from compressing everyone else's scores. Sub-scores marked "med" substitute the cohort median where the input was missing (e.g. first patch on a minor line has no prior patch for net-fix delta).

6000.6.0a4: Silent crash when launching a project from an external drive with exFAT formatting

Known issueBlockerUUM-156738

6000.6.0a7: Crash on UnityEngine.Serialization.SerializationBackendManagedCommands:ExecuteV2WriteStream when using typeof(T) in ISerializationCallbackReceiver.OnBeforeSerialize() of a struct<T>

Known issueBlockerUUM-155957

Crash on DomainUnloadAutoFree::FrameMaintenance during Editor usage

Known issueBlockerUUM-144552

Crash on mono_log_write_logfile when more than one copy of bee_backend is running

Known issueBlockerUUM-142773

6000.6.6f1

Active known blockers4