diff --git a/2021/39xxx/CVE-2021-39156.json b/2021/39xxx/CVE-2021-39156.json
index bd43b3168e4..e310b27a1b9 100644
--- a/2021/39xxx/CVE-2021-39156.json
+++ b/2021/39xxx/CVE-2021-39156.json
@@ -1,18 +1,94 @@
 {
-    "data_type": "CVE",
-    "data_format": "MITRE",
-    "data_version": "4.0",
     "CVE_data_meta": {
+        "ASSIGNER": "security-advisories@github.com",
         "ID": "CVE-2021-39156",
-        "ASSIGNER": "cve@mitre.org",
-        "STATE": "RESERVED"
+        "STATE": "PUBLIC",
+        "TITLE": "Fragments in Path May Lead to Authorization Policy Bypass"
     },
+    "affects": {
+        "vendor": {
+            "vendor_data": [
+                {
+                    "product": {
+                        "product_data": [
+                            {
+                                "product_name": "istio",
+                                "version": {
+                                    "version_data": [
+                                        {
+                                            "version_value": "< 1.9.8"
+                                        },
+                                        {
+                                            "version_value": ">= 1.10.0, < 1.10.4"
+                                        },
+                                        {
+                                            "version_value": ">= 1.11.0, < 1.11.1"
+                                        }
+                                    ]
+                                }
+                            }
+                        ]
+                    },
+                    "vendor_name": "istio"
+                }
+            ]
+        }
+    },
+    "data_format": "MITRE",
+    "data_type": "CVE",
+    "data_version": "4.0",
     "description": {
         "description_data": [
             {
                 "lang": "eng",
-                "value": "** RESERVED ** This candidate has been reserved by an organization or individual that will use it when announcing a new security problem. When the candidate has been publicized, the details for this candidate will be provided."
+                "value": "Istio is an open source platform for providing a uniform way to integrate microservices, manage traffic flow across microservices, enforce policies and aggregate telemetry data. Istio 1.11.0, 1.10.3 and below, and 1.9.7 and below contain a remotely exploitable vulnerability where an HTTP request with `#fragment` in the path may bypass Istio’s URI path based authorization policies. Patches are available in Istio 1.11.1, Istio 1.10.4 and Istio 1.9.8. As a work around a Lua filter may be written to normalize the path."
             }
         ]
+    },
+    "impact": {
+        "cvss": {
+            "attackComplexity": "LOW",
+            "attackVector": "NETWORK",
+            "availabilityImpact": "NONE",
+            "baseScore": 8.1,
+            "baseSeverity": "HIGH",
+            "confidentialityImpact": "HIGH",
+            "integrityImpact": "HIGH",
+            "privilegesRequired": "NONE",
+            "scope": "UNCHANGED",
+            "userInteraction": "REQUIRED",
+            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N",
+            "version": "3.1"
+        }
+    },
+    "problemtype": {
+        "problemtype_data": [
+            {
+                "description": [
+                    {
+                        "lang": "eng",
+                        "value": "CWE-863: Incorrect Authorization"
+                    }
+                ]
+            }
+        ]
+    },
+    "references": {
+        "reference_data": [
+            {
+                "name": "https://github.com/istio/istio/security/advisories/GHSA-hqxw-mm44-gc4r",
+                "refsource": "CONFIRM",
+                "url": "https://github.com/istio/istio/security/advisories/GHSA-hqxw-mm44-gc4r"
+            },
+            {
+                "name": "https://istio.io/latest/news/security/istio-security-2021-008",
+                "refsource": "MISC",
+                "url": "https://istio.io/latest/news/security/istio-security-2021-008"
+            }
+        ]
+    },
+    "source": {
+        "advisory": "GHSA-hqxw-mm44-gc4r",
+        "discovery": "UNKNOWN"
     }
 }
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