diff --git a/src/core/cff_parser.js b/src/core/cff_parser.js
index d2beed37c..2a9f3cb0e 100644
--- a/src/core/cff_parser.js
+++ b/src/core/cff_parser.js
@@ -995,6 +995,11 @@ var CFFDict = (function CFFDictClosure() {
       // remove the array wrapping these types of values
       if (type === 'num' || type === 'sid' || type === 'offset') {
         value = value[0];
+        // Ignore invalid values (fixes bug 1068432).
+        if (isNaN(value)) {
+          warn('Invalid CFFDict value: ' + value + ', for key: ' + key + '.');
+          return true;
+        }
       }
       this.values[key] = value;
       return true;
diff --git a/test/pdfs/.gitignore b/test/pdfs/.gitignore
index ba364de32..e2a366caa 100644
--- a/test/pdfs/.gitignore
+++ b/test/pdfs/.gitignore
@@ -36,6 +36,7 @@
 !bug1020858.pdf
 !bug1050040.pdf
 !bug1200096.pdf
+!bug1068432.pdf
 !issue5564_reduced.pdf
 !canvas.pdf
 !bug1132849.pdf
diff --git a/test/pdfs/bug1068432.pdf b/test/pdfs/bug1068432.pdf
new file mode 100644
index 000000000..da128bbab
Binary files /dev/null and b/test/pdfs/bug1068432.pdf differ
diff --git a/test/test_manifest.json b/test/test_manifest.json
index 372db8416..545fc076a 100644
--- a/test/test_manifest.json
+++ b/test/test_manifest.json
@@ -203,6 +203,13 @@
        "lastPage": 1,
        "type": "eq"
     },
+    {  "id": "bug1068432",
+       "file": "pdfs/bug1068432.pdf",
+       "md5": "b76ac8d7d0ef471f28535c881f421e33",
+       "rounds": 1,
+       "link": false,
+       "type": "eq"
+    },
     {  "id": "issue1512",
        "file": "pdfs/issue1512r.pdf",
        "md5": "af48ede2658d99cca423147085c6609b",
diff --git a/test/unit/cff_parser_spec.js b/test/unit/cff_parser_spec.js
index a0e8cf2be..67594d3f3 100644
--- a/test/unit/cff_parser_spec.js
+++ b/test/unit/cff_parser_spec.js
@@ -95,6 +95,15 @@ describe('CFFParser', function() {
     expect(topDict.getByName('Private')).toEqual([45, 102]);
   });
 
+  it('refuses to add topDict key with invalid value (bug 1068432)',
+      function () {
+    var topDict = cff.topDict;
+    var defaultValue = topDict.getByName('UnderlinePosition');
+
+    topDict.setByKey(/* [12, 3] = */ 3075, [NaN]);
+    expect(topDict.getByName('UnderlinePosition')).toEqual(defaultValue);
+  });
+
   it('parses a CharString having cntrmask', function() {
     var bytes = new Uint8Array([0, 1, // count
                                 1,  // offsetSize