When a guest user changes a time grain native filter on an embedded dashboard, Superset returns a 403 "Guest user cannot modify chart payload". This is a known upstream bug — apache/superset PR #41017 (merged June 15, 2026) fixes it by stripping the timeGrain key from the frozen-value comparison in query_context_modified before checking for payload tampering.
The fix ships in Superset 6.2.0. Once we upgrade from 6.1.0, the issue resolves with no config changes needed.
Reference: apache/superset#32768
When a guest user changes a time grain native filter on an embedded dashboard, Superset returns a 403 "Guest user cannot modify chart payload". This is a known upstream bug — apache/superset PR #41017 (merged June 15, 2026) fixes it by stripping the timeGrain key from the frozen-value comparison in query_context_modified before checking for payload tampering.
The fix ships in Superset 6.2.0. Once we upgrade from 6.1.0, the issue resolves with no config changes needed.
Reference: apache/superset#32768