diff --git a/services/src/main/java/org/keycloak/services/managers/AuthenticationManager.java b/services/src/main/java/org/keycloak/services/managers/AuthenticationManager.java
index 87df91759f..345a388b43 100755
--- a/services/src/main/java/org/keycloak/services/managers/AuthenticationManager.java
+++ b/services/src/main/java/org/keycloak/services/managers/AuthenticationManager.java
@@ -629,7 +629,8 @@ public class AuthenticationManager {
 
     public static String getRealmCookiePath(RealmModel realm, UriInfo uriInfo) {
         URI uri = RealmsResource.realmBaseUrl(uriInfo).build(realm.getName());
-        return uri.getRawPath();
+        // KEYCLOAK-5270
+        return uri.getRawPath() + "/";
     }
 
     public static String getAccountCookiePath(RealmModel realm, UriInfo uriInfo) {
diff --git a/testsuite/integration-arquillian/tests/base/src/test/java/org/keycloak/testsuite/cookies/CookiesPathTest.java b/testsuite/integration-arquillian/tests/base/src/test/java/org/keycloak/testsuite/cookies/CookiesPathTest.java
new file mode 100644
index 0000000000..71aa622157
--- /dev/null
+++ b/testsuite/integration-arquillian/tests/base/src/test/java/org/keycloak/testsuite/cookies/CookiesPathTest.java
@@ -0,0 +1,82 @@
+package org.keycloak.testsuite.cookies;
+
+import org.hamcrest.Matchers;
+import org.junit.Assert;
+import org.junit.Test;
+import org.keycloak.models.AdminRoles;
+import org.keycloak.models.Constants;
+import org.keycloak.representations.idm.RealmRepresentation;
+import org.keycloak.testsuite.AbstractKeycloakTest;
+import org.keycloak.testsuite.util.ClientBuilder;
+import org.keycloak.testsuite.util.RealmBuilder;
+import org.keycloak.testsuite.util.URLUtils;
+import org.keycloak.testsuite.util.UserBuilder;
+import org.openqa.selenium.Cookie;
+
+import java.util.List;
+import java.util.Set;
+
+/**
+ * @author <a href="mailto:mkanis@redhat.com">Martin Kanis</a>
+ */
+public class CookiesPathTest extends AbstractKeycloakTest {
+
+    @Test
+    public void testCookiesPath() {
+        // navigate to "/realms/foo/account" and remove cookies in the browser for the current path
+        // first access to the path means there are no cookies being sent
+        // we are redirected to login page and Keycloak sets cookie's path to "/auth/realms/foo/"
+        deleteAllCookiesForRealm("foo");
+
+        Assert.assertTrue("There shouldn't be any cookies sent!", driver.manage().getCookies().isEmpty());
+
+        // refresh the page and cookies are sent within the request
+        driver.navigate().refresh();
+
+        Set<Cookie> cookies = driver.manage().getCookies();
+        Assert.assertTrue("There should be cookies sent!", cookies.size() > 0);
+        // check cookie's path, for some reason IE adds extra slash to the beginning of the path
+        cookies.stream().forEach(cookie -> Assert.assertThat(cookie.getPath(), Matchers.endsWith("/auth/realms/foo/")));
+
+        // now navigate to realm which name overlaps the first realm and delete cookies for that realm (foobar)
+        //
+        deleteAllCookiesForRealm("foobar");
+
+        // cookies shouldn't be sent for the first access to /realms/foobar/account
+        // At this moment IE would sent cookies for /auth/realms/foo without the fix
+        cookies = driver.manage().getCookies();
+        Assert.assertTrue("There shouldn't be any cookies sent!", cookies.isEmpty());
+
+        // refresh the page and check if correct cookies were sent
+        driver.navigate().refresh();
+        cookies = driver.manage().getCookies();
+
+        Assert.assertTrue("There should be cookies sent!", cookies.size() > 0);
+        // check cookie's path, for some reason IE adds extra slash to the beginning of the path
+        cookies.stream().forEach(cookie -> Assert.assertThat(cookie.getPath(), Matchers.endsWith("/auth/realms/foobar/")));
+
+        // lets back to "/realms/foo/account" to test the cookies for "foo" realm are still there and haven't been (correctly) sent to "foobar"
+        URLUtils.navigateToUri( oauth.AUTH_SERVER_ROOT + "/realms/foo/account", true);
+
+        cookies = driver.manage().getCookies();
+        Assert.assertTrue("There should be cookies sent!", cookies.size() > 0);
+        cookies.stream().forEach(cookie -> Assert.assertThat(cookie.getPath(), Matchers.endsWith("/auth/realms/foo/")));
+    }
+
+    /**
+     * Add two realms which names are overlapping i.e foo and foobar
+     * @param testRealms
+     */
+    @Override
+    public void addTestRealms(List<RealmRepresentation> testRealms) {
+        RealmBuilder foo = RealmBuilder.create().name("foo").testEventListener();
+        foo.client(ClientBuilder.create().clientId("myclient").publicClient().directAccessGrants());
+        foo.user(UserBuilder.create().username("foo").password("password").role(Constants.REALM_MANAGEMENT_CLIENT_ID, AdminRoles.REALM_ADMIN));
+        testRealms.add(foo.build());
+
+        RealmBuilder foobar = RealmBuilder.create().name("foobar").testEventListener();
+        foobar.client(ClientBuilder.create().clientId("myclient").publicClient().directAccessGrants());
+        foobar.user(UserBuilder.create().username("foobar").password("password").role(Constants.REALM_MANAGEMENT_CLIENT_ID, AdminRoles.REALM_ADMIN));
+        testRealms.add(foobar.build());
+    }
+}