diff --git a/addons/mail/models/mail_thread.py b/addons/mail/models/mail_thread.py
index f732c314ef2..49cd4487ed7 100644
--- a/addons/mail/models/mail_thread.py
+++ b/addons/mail/models/mail_thread.py
@@ -3148,8 +3148,12 @@ class MailThread(models.AbstractModel):
         return self.env['ir.attachment'].search([('res_id', '=', self.id), ('res_model', '=', self._name)], order='id desc')
 
     def _get_mail_thread_data(self, request_list):
+        res = {'hasWriteAccess': False, 'hasReadAccess': True}
+        if not self:
+            res['hasReadAccess'] = False
+            return res
+
         self.ensure_one()
-        res = {'hasWriteAccess': False}
         try:
             self.check_access_rights("write")
             self.check_access_rule("write")
diff --git a/addons/mail/static/src/models/chatter.js b/addons/mail/static/src/models/chatter.js
index 75e2d28d1a7..cf6a33b4970 100644
--- a/addons/mail/static/src/models/chatter.js
+++ b/addons/mail/static/src/models/chatter.js
@@ -237,7 +237,7 @@ registerModel({
          * @returns {boolean}
          */
         _computeIsDisabled() {
-            return Boolean(!this.thread || this.thread.isTemporary);
+            return Boolean(!this.thread || this.thread.isTemporary || !this.thread.hasReadAccess);
         },
         /**
          * @private
diff --git a/addons/mail/static/src/models/thread.js b/addons/mail/static/src/models/thread.js
index 4169aaaac95..0c979d1f844 100644
--- a/addons/mail/static/src/models/thread.js
+++ b/addons/mail/static/src/models/thread.js
@@ -526,6 +526,7 @@ registerModel({
                 followers: followersData,
                 hasWriteAccess,
                 mainAttachment,
+                hasReadAccess,
                 suggestedRecipients: suggestedRecipientsData,
             } = await this.messaging.rpc({
                 route: '/mail/thread/data',
@@ -538,7 +539,7 @@ registerModel({
             if (!this.exists()) {
                 return;
             }
-            const values = { hasWriteAccess, mainAttachment };
+            const values = { hasWriteAccess, mainAttachment, hasReadAccess };
             if (activitiesData) {
                 Object.assign(values, {
                     activities: insertAndReplace(activitiesData.map(activityData =>
@@ -1873,6 +1874,10 @@ registerModel({
         guestMembers: many('Guest', {
             sort: '_sortGuestMembers',
         }),
+        /**
+         * States whether the current user has read access for this thread.
+         */
+        hasReadAccess: attr(),
         /**
          * States whether `this` has activities (`mail.activity.mixin` server side).
          */
diff --git a/addons/mail/static/tests/helpers/mock_server.js b/addons/mail/static/tests/helpers/mock_server.js
index 2bef3499a3b..17e4c374b74 100644
--- a/addons/mail/static/tests/helpers/mock_server.js
+++ b/addons/mail/static/tests/helpers/mock_server.js
@@ -512,10 +512,11 @@ patch(MockServer.prototype, 'mail', {
     async _mockRouteMailThreadData(thread_model, thread_id, request_list) {
         const res = {
             'hasWriteAccess': true, // mimic user with write access by default
+            'hasReadAccess': true,
         };
         const thread = this.pyEnv[thread_model].searchRead([['id', '=', thread_id]])[0];
         if (!thread) {
-            console.warn(`mock server: reading data "${request_list}" from invalid thread "${thread_model}_${thread_id}"`);
+            res['hasReadAccess'] = false;
             return res;
         }
         if (request_list.includes('activities')) {