diff --git a/addons/event/report/event_event_templates.xml b/addons/event/report/event_event_templates.xml
index 3f12a45cd42..76b64138f44 100644
--- a/addons/event/report/event_event_templates.xml
+++ b/addons/event/report/event_event_templates.xml
@@ -15,7 +15,7 @@
                                         <div t-field="o.event_id.event_logo"/>
                                     </t>
                                     <span t-if="not o.event_id.event_logo and o.event_id.organizer_id.company_id.logo_web and o.event_id.organizer_id.is_company">
-                                        <img t-att-src="'data:image/png;base64,%s' % o.event_id.organizer_id.company_id.logo_web" style="max-height:1cm; max-width:4cm;"/>
+                                        <img t-att-src="'data:image/png;base64,%s' % to_text(o.event_id.organizer_id.company_id.logo_web)" style="max-height:1cm; max-width:4cm;"/>
                                     </span>
                                     <h5 t-field="o.event_id.name"/>
                                     <h5>( <i class="fa fa-clock-o"></i> <span itemprop="startDate" t-field="o.event_id.date_begin" t-options='{"hide_seconds": True}'> </span> <i>to</i> <span itemprop="endDate" t-field="o.event_id.date_end" t-options='{"hide_seconds": True}'> </span> )</h5>
@@ -65,7 +65,7 @@
                                 <div class="col-xs-12">
                                     <span t-if="event.organizer_id.is_company and event.organizer_id.company_id.logo_web">
                                         <div t-field="event.event_logo">
-                                            <img t-att-src="'data:image/png;base64,%s' % event.organizer_id.company_id.logo_web" style="max-height:1cm; max-width:4cm;"/>
+                                            <img t-att-src="'data:image/png;base64,%s' % to_text(event.organizer_id.company_id.logo_web)" style="max-height:1cm; max-width:4cm;"/>
                                         </div>
                                     </span>
                                     <h4 t-field="event.name"/>
diff --git a/addons/hr_attendance/report/hr_employee_badge.xml b/addons/hr_attendance/report/hr_employee_badge.xml
index 0961d0b178b..cac5c5eee16 100644
--- a/addons/hr_attendance/report/hr_employee_badge.xml
+++ b/addons/hr_attendance/report/hr_employee_badge.xml
@@ -20,12 +20,12 @@
                                 <table style="width:77pt; height:150pt">
                                     <tr style="height:30%">
                                         <td align="center" valign="center">
-                                            <img t-if="employee.company_id and employee.company_id.logo" t-att-src="'data:image/png;base64,%s' % (employee.company_id.logo,)" style="max-height:45pt;max-width:90%" alt="Company Logo"/>
+                                            <img t-if="employee.company_id and employee.company_id.logo" t-att-src="'data:image/png;base64,%s' % to_text(employee.company_id.logo)" style="max-height:45pt;max-width:90%" alt="Company Logo"/>
                                         </td>
                                     </tr>
                                     <tr style="height:70%;">
                                         <td align="center" valign="center">
-                                            <img t-if="employee.image" t-att-src="'data:image/png;base64,%s' % (employee.image,)" style="max-height:85pt;max-width:90%" alt="Employee Image"/>
+                                            <img t-if="employee.image" t-att-src="'data:image/png;base64,%s' % to_text(employee.image)" style="max-height:85pt;max-width:90%" alt="Employee Image"/>
                                         </td>
                                     </tr>
                                 </table>
diff --git a/addons/stock/report/report_lot_barcode.xml b/addons/stock/report/report_lot_barcode.xml
index 788c8af9caf..1728782a2ef 100644
--- a/addons/stock/report/report_lot_barcode.xml
+++ b/addons/stock/report/report_lot_barcode.xml
@@ -27,7 +27,7 @@
                             </table>
                         </div>
                         <div class="col-xs-4">
-                            <img class="image" t-att-src="'data:image/png;base64,%s' % res_company.logo" style="border:auto;"/>
+                            <img class="image" t-att-src="'data:image/png;base64,%s' % to_text(res_company.logo)" style="border:auto;"/>
                         </div>
                     </div>
                     <div class="row">
diff --git a/addons/stock/report/report_package_barcode.xml b/addons/stock/report/report_package_barcode.xml
index 3911ba6f907..cdf626547cf 100644
--- a/addons/stock/report/report_package_barcode.xml
+++ b/addons/stock/report/report_package_barcode.xml
@@ -34,7 +34,7 @@
                             </table>
                         </div>
                         <div class="col-xs-4">
-                            <img class="image" t-att-src="'data:image/png;base64,%s' % res_company.logo" style="border:auto;"/>
+                            <img class="image" t-att-src="'data:image/png;base64,%s' % to_text(res_company.logo)" style="border:auto;"/>
                         </div>
                     </div>
                     <div class="row">
diff --git a/addons/web/views/report_templates.xml b/addons/web/views/report_templates.xml
index 0d164a844c2..23b1b71f0a0 100644
--- a/addons/web/views/report_templates.xml
+++ b/addons/web/views/report_templates.xml
@@ -142,7 +142,7 @@
             <div class="pull-right">
                 <h3 class="mt0 text-right" t-field="company.report_header"/>
             </div>
-            <img t-if="company.logo" t-att-src="'data:image/png;base64,%s' % company.logo" class="pull-left"/>
+            <img t-if="company.logo" t-att-src="'data:image/png;base64,%s' % to_text(company.logo)" class="pull-left"/>
             <div class="pull-left company_address">
                 <div>
                     <strong t-field="company.partner_id.name"/>
@@ -180,7 +180,7 @@
         <div class="header o_boxed_header">
             <div class="row mb8">
                 <div class="col-xs-6">
-                    <img t-if="company.logo" t-att-src="'data:image/png;base64,%s' % company.logo"/>
+                    <img t-if="company.logo" t-att-src="'data:image/png;base64,%s' % to_text(company.logo)"/>
                 </div>
                 <div class="col-xs-6 text-right mb4">
                     <h4 class="mt0" t-field="company.report_header"/>
@@ -216,7 +216,7 @@
         <div class="header o_clean_header">
             <div class="row">
                 <div class="col-xs-6">
-                    <img t-if="company.logo" t-att-src="'data:image/png;base64,%s' % company.logo"/>
+                    <img t-if="company.logo" t-att-src="'data:image/png;base64,%s' % to_text(company.logo)"/>
                 </div>
                 <div class="col-xs-5 col-xs-offset-1" name="company_address">
                     <ul class="list-unstyled">
@@ -259,7 +259,7 @@
         <div class="header">
             <div class="row">
                 <div class="col-xs-3 mb4">
-                    <img t-if="company.logo" t-att-src="'data:image/png;base64,%s' % company.logo" style="max-height: 45px;"/>
+                    <img t-if="company.logo" t-att-src="'data:image/png;base64,%s' % to_text(company.logo)" style="max-height: 45px;"/>
                 </div>
                 <div class="col-xs-9 text-right" style="margin-top:22px;" t-field="company.report_header" name="moto"/>
             </div>
diff --git a/addons/website_livechat/views/website_livechat.xml b/addons/website_livechat/views/website_livechat.xml
index c43c4294dec..3a0caa340ba 100644
--- a/addons/website_livechat/views/website_livechat.xml
+++ b/addons/website_livechat/views/website_livechat.xml
@@ -126,7 +126,7 @@
                             <t t-foreach="team" t-as="user" class="media">
                                 <div class="media">
                                     <div class="pull-left" t-if='user.image_small'>
-                                        <img t-att-src="user.image_small and ('data:image/png;base64,' + user.image_small) or '/web/static/src/img/placeholder.png'"
+                                        <img t-att-src="user.image_small and ('data:image/png;base64,' + to_text(user.image_small)) or '/web/static/src/img/placeholder.png'"
                                             class="img-rounded" t-att-alt="user.name"/>
                                     </div>
                                     <div class="media-body">
@@ -159,7 +159,7 @@
                                     <t t-foreach="channels" t-as="channel">
                                         <div class="media">
                                             <a class="pull-left" t-attf-href="/livechat/channel/#{ slug(channel)}">
-                                                <img t-att-src="channel.image_small and ('data:image/png;base64,' + channel.image_small) or '/web/static/src/img/placeholder.png'" t-att-alt="channel.name" />
+                                                <img t-att-src="channel.image_small and ('data:image/png;base64,' + to_text(channel.image_small)) or '/web/static/src/img/placeholder.png'" t-att-alt="channel.name" />
                                             </a>
                                             <div class="media-body">
                                                 <h4 class="media-heading"><t t-esc="channel.name"/></h4>
diff --git a/odoo/addons/base/ir/ir_actions_report.py b/odoo/addons/base/ir/ir_actions_report.py
index af6f448f839..9451a7ebff4 100644
--- a/odoo/addons/base/ir/ir_actions_report.py
+++ b/odoo/addons/base/ir/ir_actions_report.py
@@ -12,6 +12,7 @@ import time
 import base64
 import io
 import logging
+import odoo
 import os
 import lxml.html
 import tempfile
@@ -465,7 +466,8 @@ class IrActionsReport(models.Model):
             user=user,
             res_company=user.company_id,
             website=website,
-            web_base_url=self.env['ir.config_parameter'].sudo().get_param('web.base.url', default='')
+            web_base_url=self.env['ir.config_parameter'].sudo().get_param('web.base.url', default=''),
+            to_text=odoo.tools.pycompat.to_text,
         )
         return view_obj.render_template(template, values)