diff --git a/docs/CHANGELOG.txt b/docs/CHANGELOG.txt
index 3dfeb941b..c69d92f79 100644
--- a/docs/CHANGELOG.txt
+++ b/docs/CHANGELOG.txt
@@ -46,6 +46,7 @@ Other Changes:
 - InputText:
   - InputTextMultiline: fixed an issue processing deactivation logic when an active
     multi-line edit is clipped due to being out of view.
+  - Fixed a crash when toggling ReadOnly while active. (#9354)
 - Tables:
   - Fixed an issue reporting ideal size to parent window/container when both scrollbars
     are visible but only one of ScrollX/ScrollY was explicitly requested. (#9352, #7651)
diff --git a/imgui_widgets.cpp b/imgui_widgets.cpp
index d96c5711e..2880ed6ba 100644
--- a/imgui_widgets.cpp
+++ b/imgui_widgets.cpp
@@ -4800,7 +4800,8 @@ bool ImGui::InputTextEx(const char* label, const char* hint, char* buf, int buf_
     float scroll_y = is_multiline ? draw_window->Scroll.y : FLT_MAX;
 
     const bool init_reload_from_user_buf = (state != NULL && state->WantReloadUserBuf);
-    const bool init_changed_specs = (state != NULL && state->Stb->single_line != !is_multiline); // state != NULL means its our state.
+    const bool init_changed_specs_multiline = (state != NULL && (state->Stb->single_line != !is_multiline)); // state != NULL means its our state.
+    const bool init_changed_specs_readonly = (state != NULL && ((state->Flags ^ flags) & ImGuiInputTextFlags_ReadOnly)); // state != NULL means its our state.
     const bool init_make_active = (input_requested_by_user || input_requested_by_nav || input_requested_by_reactivate || user_scroll_finish);
     if (init_reload_from_user_buf)
     {
@@ -4814,7 +4815,7 @@ bool ImGui::InputTextEx(const char* label, const char* hint, char* buf, int buf_
         state->Stb->select_start = state->ReloadSelectionStart;
         state->Stb->cursor = state->Stb->select_end = state->ReloadSelectionEnd; // will be clamped to bounds below
     }
-    else if ((init_make_active && g.ActiveId != id) || init_changed_specs)
+    else if ((init_make_active && g.ActiveId != id) || init_changed_specs_multiline || init_changed_specs_readonly)
     {
         // Access state even if we don't own it yet.
         state = &g.InputTextState;
@@ -4835,8 +4836,8 @@ bool ImGui::InputTextEx(const char* label, const char* hint, char* buf, int buf_
 
         // Preserve cursor position and undo/redo stack if we come back to same widget
         // FIXME: Since we reworked this on 2022/06, may want to differentiate recycle_cursor vs recycle_undostate?
-        bool recycle_state = (state->ID == id && !init_changed_specs);
-        if (recycle_state && (state->TextLen != buf_len || (state->TextA.Data == NULL || strncmp(state->TextA.Data, buf, buf_len) != 0)))
+        bool recycle_state = (state->ID == id && !init_changed_specs_multiline);
+        if (recycle_state && !init_changed_specs_readonly && (state->TextLen != buf_len || (state->TextA.Data == NULL || strncmp(state->TextA.Data, buf, buf_len) != 0)))
             recycle_state = false;
 
         // Start edition
@@ -4945,13 +4946,17 @@ bool ImGui::InputTextEx(const char* label, const char* hint, char* buf, int buf_
     if (is_password && !is_displaying_hint)
         PushPasswordFont();
 
-    // Word-wrapping: attempt to keep cursor in view while resizing frame/parent
-    // FIXME-WORDWRAP: It would be better to preserve same relative offset.
-    if (is_wordwrap && state != NULL && state->ID == id && state->WrapWidth != wrap_width)
+    if (state != NULL && state->ID == id)
     {
-        state->CursorCenterY = true;
-        state->WrapWidth = wrap_width;
-        render_cursor = true;
+        state->Flags = flags;
+
+        // Word-wrapping: attempt to keep cursor in view while resizing frame/parent (FIXME-WORDWRAP: would be better to preserve same relative offset)
+        if (is_wordwrap && state->WrapWidth != wrap_width)
+        {
+            state->CursorCenterY = true;
+            state->WrapWidth = wrap_width;
+            render_cursor = true;
+        }
     }
 
     // Process mouse inputs and character inputs
@@ -4960,7 +4965,6 @@ bool ImGui::InputTextEx(const char* label, const char* hint, char* buf, int buf_
         IM_ASSERT(state != NULL);
         state->EditedThisFrame = false;
         state->BufCapacity = buf_size;
-        state->Flags = flags;
         state->WrapWidth = wrap_width;
 
         // Although we are active we don't prevent mouse from hovering other elements unless we are interacting right now with the widget.