diff --git a/CHANGELOG.md b/CHANGELOG.md
index 311426b09c2..703b288079d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -19,6 +19,7 @@
 
 ### Changes
 
+* [#6854](https://github.com/rubocop-hq/rubocop/pull/6854): Mark Rails/LexicallyScopedActionFilter as unsafe and document risks. ([@urbanautomaton][])
 * [#5977](https://github.com/rubocop-hq/rubocop/issues/5977): Warn for Performance Cops. ([@koic][])
 * [#6637](https://github.com/rubocop-hq/rubocop/issues/6637): Move `LstripRstrip` from `Performance` to `Style` department and rename it to `Strip`. ([@anuja-joshi][])
 
diff --git a/config/default.yml b/config/default.yml
index 148b492cec8..1f3552155fe 100644
--- a/config/default.yml
+++ b/config/default.yml
@@ -2445,6 +2445,7 @@ Rails/LexicallyScopedActionFilter:
   Description: "Checks that methods specified in the filter's `only` or `except` options are explicitly defined in the controller."
   StyleGuide: 'https://github.com/rubocop-hq/rails-style-guide#lexically-scoped-action-filter'
   Enabled: true
+  Safe: false
   VersionAdded: '0.52'
   Include:
     - app/controllers/**/*.rb
diff --git a/manual/cops_rails.md b/manual/cops_rails.md
index cef62e3fe0f..7223cf1addf 100644
--- a/manual/cops_rails.md
+++ b/manual/cops_rails.md
@@ -1164,7 +1164,7 @@ Include | `app/models/**/*.rb` | Array
 
 Enabled by default | Safe | Supports autocorrection | VersionAdded | VersionChanged
 --- | --- | --- | --- | ---
-Enabled | Yes | No | 0.52 | -
+Enabled | No | No | 0.52 | -
 
 This cop checks that methods specified in the filter's `only` or
 `except` options are defined within the same class or module.