diff --git a/changelog/unreleased/36503-2 b/changelog/unreleased/36503-2
new file mode 100644
index 000000000000..dbc794f9a486
--- /dev/null
+++ b/changelog/unreleased/36503-2
@@ -0,0 +1,21 @@
+Change: Update Symfony components to 3.4.36
+
+The following Symfony components have been updated to version 3.4.36:
+- console
+- debug
+- event-dispatcher
+- polyfill-mbstring
+- process
+- translation
+- routing
+
+The following Symfony polyfill components have been updated to 1.31.1:
+- polyfill-util
+- polyfill-php56
+- polyfill-iconv
+- polyfill-php72
+- polyfill-intl-idn
+- polyfill-ctype
+
+https://symfony.com/blog/symfony-3-4-36-released
+https://github.com/owncloud/core/pull/36503
diff --git a/composer.lock b/composer.lock
index cabb9e8dd684..1fb4dc0e7b38 100644
--- a/composer.lock
+++ b/composer.lock
@@ -2261,16 +2261,16 @@
         },
         {
             "name": "symfony/console",
-            "version": "v3.4.35",
+            "version": "v3.4.36",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/console.git",
-                "reference": "17b154f932c5874cdbda6d05796b6490eec9f9f7"
+                "reference": "1ee23b3b659b06c622f2bd2492a229e416eb4586"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/console/zipball/17b154f932c5874cdbda6d05796b6490eec9f9f7",
-                "reference": "17b154f932c5874cdbda6d05796b6490eec9f9f7",
+                "url": "https://api.github.com/repos/symfony/console/zipball/1ee23b3b659b06c622f2bd2492a229e416eb4586",
+                "reference": "1ee23b3b659b06c622f2bd2492a229e416eb4586",
                 "shasum": ""
             },
             "require": {
@@ -2329,11 +2329,11 @@
             ],
             "description": "Symfony Console Component",
             "homepage": "https://symfony.com",
-            "time": "2019-11-13T07:12:39+00:00"
+            "time": "2019-12-01T10:04:45+00:00"
         },
         {
             "name": "symfony/debug",
-            "version": "v3.4.35",
+            "version": "v3.4.36",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/debug.git",
@@ -2389,7 +2389,7 @@
         },
         {
             "name": "symfony/event-dispatcher",
-            "version": "v3.4.35",
+            "version": "v3.4.36",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/event-dispatcher.git",
@@ -2452,7 +2452,7 @@
         },
         {
             "name": "symfony/polyfill-iconv",
-            "version": "v1.13.0",
+            "version": "v1.13.1",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/polyfill-iconv.git",
@@ -2511,7 +2511,7 @@
         },
         {
             "name": "symfony/polyfill-intl-idn",
-            "version": "v1.13.0",
+            "version": "v1.13.1",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/polyfill-intl-idn.git",
@@ -2573,7 +2573,7 @@
         },
         {
             "name": "symfony/polyfill-mbstring",
-            "version": "v1.13.0",
+            "version": "v1.13.1",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/polyfill-mbstring.git",
@@ -2632,7 +2632,7 @@
         },
         {
             "name": "symfony/polyfill-php56",
-            "version": "v1.13.0",
+            "version": "v1.13.1",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/polyfill-php56.git",
@@ -2688,7 +2688,7 @@
         },
         {
             "name": "symfony/polyfill-php72",
-            "version": "v1.13.0",
+            "version": "v1.13.1",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/polyfill-php72.git",
@@ -2743,7 +2743,7 @@
         },
         {
             "name": "symfony/polyfill-util",
-            "version": "v1.13.0",
+            "version": "v1.13.1",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/polyfill-util.git",
@@ -2795,16 +2795,16 @@
         },
         {
             "name": "symfony/process",
-            "version": "v3.4.35",
+            "version": "v3.4.36",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/process.git",
-                "reference": "c19da50bc3e8fa7d60628fdb4ab5d67de534cf3e"
+                "reference": "9a4545c01e1e4f473492bd52b71e574dcc401ca2"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/process/zipball/c19da50bc3e8fa7d60628fdb4ab5d67de534cf3e",
-                "reference": "c19da50bc3e8fa7d60628fdb4ab5d67de534cf3e",
+                "url": "https://api.github.com/repos/symfony/process/zipball/9a4545c01e1e4f473492bd52b71e574dcc401ca2",
+                "reference": "9a4545c01e1e4f473492bd52b71e574dcc401ca2",
                 "shasum": ""
             },
             "require": {
@@ -2840,20 +2840,20 @@
             ],
             "description": "Symfony Process Component",
             "homepage": "https://symfony.com",
-            "time": "2019-10-24T15:33:53+00:00"
+            "time": "2019-11-28T10:05:51+00:00"
         },
         {
             "name": "symfony/routing",
-            "version": "v3.4.35",
+            "version": "v3.4.36",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/routing.git",
-                "reference": "afc10b9c6b5196e0fecbc3bd373c7b4482e5b6b5"
+                "reference": "b689ccd48e234ea404806d94b07eeb45f9f6f06a"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/routing/zipball/afc10b9c6b5196e0fecbc3bd373c7b4482e5b6b5",
-                "reference": "afc10b9c6b5196e0fecbc3bd373c7b4482e5b6b5",
+                "url": "https://api.github.com/repos/symfony/routing/zipball/b689ccd48e234ea404806d94b07eeb45f9f6f06a",
+                "reference": "b689ccd48e234ea404806d94b07eeb45f9f6f06a",
                 "shasum": ""
             },
             "require": {
@@ -2916,20 +2916,20 @@
                 "uri",
                 "url"
             ],
-            "time": "2019-11-08T17:25:00+00:00"
+            "time": "2019-12-01T08:33:36+00:00"
         },
         {
             "name": "symfony/translation",
-            "version": "v3.4.35",
+            "version": "v3.4.36",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/translation.git",
-                "reference": "2031c895bc97ac1787d418d90bd1ed7d299f2772"
+                "reference": "0be25347c4a8695d9423fe897f4c774f46e97b51"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/translation/zipball/2031c895bc97ac1787d418d90bd1ed7d299f2772",
-                "reference": "2031c895bc97ac1787d418d90bd1ed7d299f2772",
+                "url": "https://api.github.com/repos/symfony/translation/zipball/0be25347c4a8695d9423fe897f4c774f46e97b51",
+                "reference": "0be25347c4a8695d9423fe897f4c774f46e97b51",
                 "shasum": ""
             },
             "require": {
@@ -2986,7 +2986,7 @@
             ],
             "description": "Symfony Translation Component",
             "homepage": "https://symfony.com",
-            "time": "2019-10-30T12:43:22+00:00"
+            "time": "2019-11-23T20:30:33+00:00"
         },
         {
             "name": "zendframework/zend-filter",
@@ -4233,12 +4233,12 @@
             "source": {
                 "type": "git",
                 "url": "https://github.com/Roave/SecurityAdvisories.git",
-                "reference": "7b05f1705362f8a8a4b535ec5c0f174eaf4d09ec"
+                "reference": "9986511fcd47e8b8ec491884cc18beee1773548a"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/Roave/SecurityAdvisories/zipball/7b05f1705362f8a8a4b535ec5c0f174eaf4d09ec",
-                "reference": "7b05f1705362f8a8a4b535ec5c0f174eaf4d09ec",
+                "url": "https://api.github.com/repos/Roave/SecurityAdvisories/zipball/9986511fcd47e8b8ec491884cc18beee1773548a",
+                "reference": "9986511fcd47e8b8ec491884cc18beee1773548a",
                 "shasum": ""
             },
             "conflict": {
@@ -4341,7 +4341,7 @@
                 "silverstripe/userforms": "<3",
                 "simple-updates/phpwhois": "<=1",
                 "simplesamlphp/saml2": "<1.10.6|>=2,<2.3.8|>=3,<3.1.4",
-                "simplesamlphp/simplesamlphp": "<1.18",
+                "simplesamlphp/simplesamlphp": "<1.17.8",
                 "simplesamlphp/simplesamlphp-module-infocard": "<1.0.1",
                 "slim/slim": "<2.6",
                 "smarty/smarty": "<3.1.33",
@@ -4443,7 +4443,7 @@
                 }
             ],
             "description": "Prevents installation of composer packages with known security vulnerabilities: no API, simply require it",
-            "time": "2019-11-27T20:26:33+00:00"
+            "time": "2019-11-29T17:22:08+00:00"
         },
         {
             "name": "sebastian/code-unit-reverse-lookup",
@@ -5013,7 +5013,7 @@
         },
         {
             "name": "symfony/polyfill-ctype",
-            "version": "v1.13.0",
+            "version": "v1.13.1",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/polyfill-ctype.git",