diff --git a/2019/11xxx/CVE-2019-11636.json b/2019/11xxx/CVE-2019-11636.json
new file mode 100644
index 00000000000..f1de60b83ba
--- /dev/null
+++ b/2019/11xxx/CVE-2019-11636.json
@@ -0,0 +1,67 @@
+{
+    "CVE_data_meta": {
+        "ASSIGNER": "cve@mitre.org",
+        "ID": "CVE-2019-11636",
+        "STATE": "PUBLIC"
+    },
+    "affects": {
+        "vendor": {
+            "vendor_data": [
+                {
+                    "product": {
+                        "product_data": [
+                            {
+                                "product_name": "n/a",
+                                "version": {
+                                    "version_data": [
+                                        {
+                                            "version_value": "n/a"
+                                        }
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+                    "vendor_name": "n/a"
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+    },
+    "data_format": "MITRE",
+    "data_type": "CVE",
+    "data_version": "4.0",
+    "description": {
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+            {
+                "lang": "eng",
+                "value": "Zcash 2.x allows an inexpensive approach to \"fill all transactions of all blocks\" and \"prevent any real transaction from occurring\" via a \"Sapling Wood-Chipper\" attack."
+            }
+        ]
+    },
+    "problemtype": {
+        "problemtype_data": [
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+    "references": {
+        "reference_data": [
+            {
+                "url": "https://github.com/zcash/zcash/issues/3955",
+                "refsource": "MISC",
+                "name": "https://github.com/zcash/zcash/issues/3955"
+            },
+            {
+                "url": "https://twitter.com/dukeleto/status/1120467430118232066",
+                "refsource": "MISC",
+                "name": "https://twitter.com/dukeleto/status/1120467430118232066"
+            }
+        ]
+    }
+}
\ No newline at end of file
diff --git a/2019/11xxx/CVE-2019-11637.json b/2019/11xxx/CVE-2019-11637.json
new file mode 100644
index 00000000000..0ae8003f294
--- /dev/null
+++ b/2019/11xxx/CVE-2019-11637.json
@@ -0,0 +1,18 @@
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\ No newline at end of file
diff --git a/2019/11xxx/CVE-2019-11638.json b/2019/11xxx/CVE-2019-11638.json
new file mode 100644
index 00000000000..b60f3e3b953
--- /dev/null
+++ b/2019/11xxx/CVE-2019-11638.json
@@ -0,0 +1,18 @@
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+}
\ No newline at end of file
diff --git a/2019/11xxx/CVE-2019-11639.json b/2019/11xxx/CVE-2019-11639.json
new file mode 100644
index 00000000000..3041906e130
--- /dev/null
+++ b/2019/11xxx/CVE-2019-11639.json
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\ No newline at end of file
diff --git a/2019/11xxx/CVE-2019-11640.json b/2019/11xxx/CVE-2019-11640.json
new file mode 100644
index 00000000000..9292f4c1225
--- /dev/null
+++ b/2019/11xxx/CVE-2019-11640.json
@@ -0,0 +1,18 @@
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+        ]
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\ No newline at end of file