diff --git a/‎NEWS‎
Lines changed: 3 additions & 0 deletions b/‎NEWS‎
Lines changed: 3 additions & 0 deletions
diff --git a/‎lib/docx/numbering-xml.js‎
Lines changed: 20 additions & 11 deletions b/‎lib/docx/numbering-xml.js‎
Lines changed: 20 additions & 11 deletions
diff --git a/‎test/docx/numbering-xml.tests.js‎
Lines changed: 16 additions & 0 deletions b/‎test/docx/numbering-xml.tests.js‎
Lines changed: 16 additions & 0 deletions
@@ -3,6 +3,9 @@
 * Fix: on Windows, when an image's content type includes a backslash in the
   subpart, files may be written outside of the directory set by --output-dir.
 
+* Detect and ignore numbering levels that use numStyleLink to refer to
+  themselves.
+
 # 1.12.0
 
 * Handle hyperlinked wp:anchor and wp:inline elements.
 
@@ -17,20 +17,29 @@ function Numbering(nums, abstractNums, styles) {
     );
 
     function findLevel(numId, level) {
+        return findLevelWithSeenNumIds(numId, level, {});
+    }
+
+    function findLevelWithSeenNumIds(numId, level, seenNumIds) {
+        if (seenNumIds[numId]) {
+            return null;
+        }
+        seenNumIds[numId] = true;
+
         var num = nums[numId];
-        if (num) {
-            var abstractNum = abstractNums[num.abstractNumId];
-            if (!abstractNum) {
-                return null;
-            } else if (abstractNum.numStyleLink == null) {
-                return abstractNums[num.abstractNumId].levels[level];
-            } else {
-                var style = styles.findNumberingStyleById(abstractNum.numStyleLink);
-                return findLevel(style.numId, level);
-            }
-        } else {
+        if (!num) {
             return null;
         }
+
+        var abstractNum = abstractNums[num.abstractNumId];
+        if (!abstractNum) {
+            return null;
+        } else if (abstractNum.numStyleLink == null) {
+            return abstractNums[num.abstractNumId].levels[level];
+        } else {
+            var style = styles.findNumberingStyleById(abstractNum.numStyleLink);
+            return findLevelWithSeenNumIds(style.numId, level, seenNumIds);
+        }
     }
 
     function findLevelByParagraphStyleId(styleId) {
 
@@ -152,6 +152,22 @@ test('when w:abstractNum has w:numStyleLink then style is used to find w:num', f
 });
 
 
+test('when w:abstractNum has self-recursive w:numStyleLink then level is not found', function() {
+    var numbering = readNumberingXml(
+        new XmlElement("w:numbering", {}, [
+            new XmlElement("w:abstractNum", {"w:abstractNumId": "100"}, [
+                new XmlElement("w:numStyleLink", {"w:val": "List1"})
+            ]),
+            new XmlElement("w:num", {"w:numId": "200"}, [
+                new XmlElement("w:abstractNumId", {"w:val": "100"})
+            ])
+        ]),
+        {styles: new stylesReader.Styles({}, {}, {}, {"List1": {numId: "200"}})}
+    );
+    duck.assertThat(numbering.findLevel("200", "0"), duck.equalTo(null));
+});
+
+
 // See: 17.9.23 pStyle (Paragraph Style's Associated Numbering Level) in ECMA-376, 4th Edition
 test('numbering level can be found by paragraph style ID', function() {
     var numbering = readNumberingXml(