diff --git a/ports/json-c/json_object_put-leak.patch b/ports/json-c/json_object_put-leak.patch
new file mode 100644
index 0000000000..c5a5e55a55
--- /dev/null
+++ b/ports/json-c/json_object_put-leak.patch
@@ -0,0 +1,30 @@
+diff --git a/json_object.c b/json_object.c
+index 0a61967..71cd25b 100644
+--- a/json_object.c
++++ b/json_object.c
+@@ -303,6 +303,7 @@ static inline int _json_object_put_maybe_free(struct json_object *jso, int free_
+ 
+ 	if (jso->_user_delete)
+ 		jso->_user_delete(jso, jso->_userdata);
++	jso->_user_delete = NULL;
+ 
+ 	switch (jso->o_type)
+ 	{
+@@ -435,11 +436,16 @@ int json_object_put(struct json_object *jso)
+ 		// All slots are cleared, now pop back up to the parent
+ 		{
+ 			json_object *parent = jso->_delete_parent;
++			int rc;
+ 			// jso is a child that's already been detached from its parent
+ 			// so we need to actually free it now
+ 			assert(jso->_ref_count == 0);
+ 			jso->_ref_count++;   // We're the exclusive owner of jso, non-atomic add is ok.
+-			assert(_json_object_put_maybe_free(jso, 1) == 0);
++			// Note: the call must not be inside assert(), or it gets
++			// compiled out when NDEBUG is defined and the memory leaks.
++			rc = _json_object_put_maybe_free(jso, 1);
++			assert(rc == 0);
++			(void)rc;
+ 			jso = parent;
+ 			// iteration will be reset at the top of the loop
+ 		}
diff --git a/ports/json-c/portfile.cmake b/ports/json-c/portfile.cmake
index 75e4b14ddf..b710f55919 100644
--- a/ports/json-c/portfile.cmake
+++ b/ports/json-c/portfile.cmake
@@ -5,6 +5,8 @@ vcpkg_from_github(
 
     SHA512 3be9058351acb3d9a66c7ae850391ebaa80472b42ee3f013f8b655743eb41b55513e0546c6798399af98ed049b80d11c93286ea3f5af26dc5f199905a28c4db1
     HEAD_REF master
+    PATCHES
+        json_object_put-leak.patch
 )
 
 string(COMPARE EQUAL "${VCPKG_LIBRARY_LINKAGE}" "static" JSON_BUILD_STATIC)
diff --git a/ports/json-c/vcpkg.json b/ports/json-c/vcpkg.json
index 1d8b1304d5..e958a1fa10 100644
--- a/ports/json-c/vcpkg.json
+++ b/ports/json-c/vcpkg.json
@@ -1,6 +1,7 @@
 {
   "name": "json-c",
   "version": "0.19-20260627",
+  "port-version": 1,
   "description": "A JSON implementation in C",
   "homepage": "https://github.com/json-c/json-c",
   "license": "MIT",
diff --git a/versions/baseline.json b/versions/baseline.json
index 5ef29096e3..cf56f5b88e 100644
--- a/versions/baseline.json
+++ b/versions/baseline.json
@@ -4206,7 +4206,7 @@
     },
     "json-c": {
       "baseline": "0.19-20260627",
-      "port-version": 0
+      "port-version": 1
     },
     "json-dto": {
       "baseline": "0.3.4",
diff --git a/versions/j-/json-c.json b/versions/j-/json-c.json
index c5384a5ccc..7dcc4b0449 100644
--- a/versions/j-/json-c.json
+++ b/versions/j-/json-c.json
@@ -1,5 +1,10 @@
 {
   "versions": [
+    {
+      "git-tree": "25deea1a1a70dd1ede2798be21060e5dddd08347",
+      "version": "0.19-20260627",
+      "port-version": 1
+    },
     {
       "git-tree": "68b65400a836e7b30a59787525ec31c5bc5ac39b",
       "version": "0.19-20260627",