diff --git a/advisories/github-reviewed/2025/06/GHSA-826p-4gcg-35vw/GHSA-826p-4gcg-35vw.json b/advisories/github-reviewed/2025/06/GHSA-826p-4gcg-35vw/GHSA-826p-4gcg-35vw.json
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@@ -0,0 +1,205 @@
+{
+  "schema_version": "1.4.0",
+  "id": "GHSA-826p-4gcg-35vw",
+  "modified": "2025-06-09T23:14:48Z",
+  "published": "2025-06-09T23:14:48Z",
+  "aliases": [],
+  "summary": "GeoTools has XML External Entity (XXE) Processing Vulnerability in XSD schema handling",
+  "details": "### Summary\n\nGeoTools Schema class use of Eclipse XSD library to represent schema data structure is vulnerable to XML External Entity (XXE) exploit.\n\n### Impact\n\nThis impacts whoever exposes XML processing with ``gt-xsd-core`` involved in parsing, when the documents carry a reference to an external XML schema. The ``gt-xsd-core`` Schemas class is not using the EntityResolver provided by the ParserHandler (if any was configured).\n\nThis also impacts users of ``gt-wfs-ng`` DataStore where the ENTITY_RESOLVER connection parameter was not being used as intended.\n\n### Resolution\n\nGeoTools API change allows EntityResolver to be supplied to the following methods:\n\n```java\nSchemas.parse( location, locators, resolvers, uriHandlers, entityResolver);\nSchemas.findSchemas(Configuration configuration, EntityResolver entityResolver);\n```\n\nWith this API change the `gt-wfs-ng` WFS DataStore ENTITY_RESOLVER parameter is now used.\n\n### Reference\n\n* [GHSA-jj54-8f66-c5pc](https://github.com/geoserver/geoserver/security/advisories/GHSA-jj54-8f66-c5pc): Describes the impact of the ``gt-xsd-core`` vulnerability on the GeoServer WFS protocol, resulting in both Service Side Request Forgery (SSRF) and Out-of-Band (OOB) data exfiltration of local files.\n\n* [GHSA-2p76-gc46-5fvc](https://github.com/geonetwork/core-geonetwork/security/advisories/GHSA-2p76-gc46-5fvc): Describes the impact of the ``gt-wfs-ng`` and ``gt-xsd-core`` vulnerability on the GeoNetwork WFS Index functionality.",
+  "severity": [
+    {
+      "type": "CVSS_V3",
+      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:L"
+    }
+  ],
+  "affected": [
+    {
+      "package": {
+        "ecosystem": "Maven",
+        "name": "org.geotools:gt-xsd-core"
+      },
+      "ranges": [
+        {
+          "type": "ECOSYSTEM",
+          "events": [
+            {
+              "introduced": "33.0"
+            },
+            {
+              "fixed": "33.1"
+            }
+          ]
+        }
+      ],
+      "versions": [
+        "33.0"
+      ]
+    },
+    {
+      "package": {
+        "ecosystem": "Maven",
+        "name": "org.geotools:gt-xsd-core"
+      },
+      "ranges": [
+        {
+          "type": "ECOSYSTEM",
+          "events": [
+            {
+              "introduced": "32.0"
+            },
+            {
+              "fixed": "32.3"
+            }
+          ]
+        }
+      ]
+    },
+    {
+      "package": {
+        "ecosystem": "Maven",
+        "name": "org.geotools:gt-xsd-core"
+      },
+      "ranges": [
+        {
+          "type": "ECOSYSTEM",
+          "events": [
+            {
+              "introduced": "29.0"
+            },
+            {
+              "fixed": "31.7"
+            }
+          ]
+        }
+      ],
+      "database_specific": {
+        "last_known_affected_version_range": "<= 31.6"
+      }
+    },
+    {
+      "package": {
+        "ecosystem": "Maven",
+        "name": "org.geotools:gt-wfs-ng"
+      },
+      "ranges": [
+        {
+          "type": "ECOSYSTEM",
+          "events": [
+            {
+              "introduced": "33.0"
+            },
+            {
+              "fixed": "33.1"
+            }
+          ]
+        }
+      ]
+    },
+    {
+      "package": {
+        "ecosystem": "Maven",
+        "name": "org.geotools:gt-wfs-ng"
+      },
+      "ranges": [
+        {
+          "type": "ECOSYSTEM",
+          "events": [
+            {
+              "introduced": "32.0"
+            },
+            {
+              "fixed": "32.3"
+            }
+          ]
+        }
+      ]
+    },
+    {
+      "package": {
+        "ecosystem": "Maven",
+        "name": "org.geotools:gt-wfs-ng"
+      },
+      "ranges": [
+        {
+          "type": "ECOSYSTEM",
+          "events": [
+            {
+              "introduced": "29.0"
+            },
+            {
+              "fixed": "31.7"
+            }
+          ]
+        }
+      ],
+      "database_specific": {
+        "last_known_affected_version_range": "<= 31.6"
+      }
+    },
+    {
+      "package": {
+        "ecosystem": "Maven",
+        "name": "org.geotools:gt-xsd-core"
+      },
+      "ranges": [
+        {
+          "type": "ECOSYSTEM",
+          "events": [
+            {
+              "introduced": "0"
+            },
+            {
+              "fixed": "28.6.1"
+            }
+          ]
+        }
+      ]
+    },
+    {
+      "package": {
+        "ecosystem": "Maven",
+        "name": "org.geotools:gt-wfs-ng"
+      },
+      "ranges": [
+        {
+          "type": "ECOSYSTEM",
+          "events": [
+            {
+              "introduced": "0"
+            },
+            {
+              "fixed": "28.6.1"
+            }
+          ]
+        }
+      ]
+    }
+  ],
+  "references": [
+    {
+      "type": "WEB",
+      "url": "https://github.com/geonetwork/core-geonetwork/security/advisories/GHSA-2p76-gc46-5fvc"
+    },
+    {
+      "type": "WEB",
+      "url": "https://github.com/geoserver/geoserver/security/advisories/GHSA-jj54-8f66-c5pc"
+    },
+    {
+      "type": "WEB",
+      "url": "https://github.com/geotools/geotools/security/advisories/GHSA-826p-4gcg-35vw"
+    },
+    {
+      "type": "PACKAGE",
+      "url": "https://github.com/geotools/geotools"
+    }
+  ],
+  "database_specific": {
+    "cwe_ids": [
+      "CWE-611"
+    ],
+    "severity": "CRITICAL",
+    "github_reviewed": true,
+    "github_reviewed_at": "2025-06-09T23:14:48Z",
+    "nvd_published_at": null
+  }
+}
\ No newline at end of file