diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0bd81b3fe8..9ef7d9e2c2 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -134,6 +134,7 @@ ___
 - Add NPM package-lock version check to CI (Manuel Trezza) [#7333](https://github.com/parse-community/parse-server/pull/7333)
 - Fix incorrect LiveQuery events triggered for multiple subscriptions on the same class with different events [#7341](https://github.com/parse-community/parse-server/pull/7341)
 - Fix select and excludeKey queries to properly accept JSON string arrays. Also allow nested fields in exclude (Corey Baker) [#7242](https://github.com/parse-community/parse-server/pull/7242)
+- Fix LiveQuery server crash when using $all query operator on a missing object key (Jason Posthuma) [#7421](https://github.com/parse-community/parse-server/pull/7421)
 
 ___
 ## 4.5.0
diff --git a/spec/QueryTools.spec.js b/spec/QueryTools.spec.js
index de4772a61c..7e09078dad 100644
--- a/spec/QueryTools.spec.js
+++ b/spec/QueryTools.spec.js
@@ -313,6 +313,16 @@ describe('matchesQuery', function () {
     expect(matchesQuery(player, orQuery)).toBe(true);
   });
 
+  it('does not match $all query when value is missing', () => {
+    const player = {
+      id: new Id('Player', 'P1'),
+      name: 'Player 1',
+      score: 12,
+    };
+    const q = { missing: { $all: [1, 2, 3] } };
+    expect(matchesQuery(player, q)).toBe(false);
+  });
+
   it('matches an $and query', () => {
     const player = {
       id: new Id('Player', 'P1'),
diff --git a/src/LiveQuery/QueryTools.js b/src/LiveQuery/QueryTools.js
index 735788218b..905919ef61 100644
--- a/src/LiveQuery/QueryTools.js
+++ b/src/LiveQuery/QueryTools.js
@@ -253,6 +253,9 @@ function matchesKeyConstraints(object, key, constraints) {
         }
         break;
       case '$all':
+        if (!object[key]) {
+          return false;
+        }
         for (i = 0; i < compareTo.length; i++) {
           if (object[key].indexOf(compareTo[i]) < 0) {
             return false;