diff --git a/packages/rulesets/src/oas/__tests__/duplicated-entry-in-enum.test.ts b/packages/rulesets/src/oas/__tests__/duplicated-entry-in-enum.test.ts
index b6cc674b4..c104f14c5 100644
--- a/packages/rulesets/src/oas/__tests__/duplicated-entry-in-enum.test.ts
+++ b/packages/rulesets/src/oas/__tests__/duplicated-entry-in-enum.test.ts
@@ -158,4 +158,23 @@ testRule('duplicated-entry-in-enum', [
     },
     errors: [],
   },
+
+  {
+    name: 'oas3: null nodes in example values do not crash (regression #2959)',
+    document: {
+      openapi: '3.0.2',
+      info: { title: 'Test', version: '1.0' },
+      paths: {},
+      components: {
+        examples: {
+          test: {
+            value: {
+              foo: null,
+            },
+          },
+        },
+      },
+    },
+    errors: [],
+  },
 ]);
diff --git a/packages/rulesets/src/oas/index.ts b/packages/rulesets/src/oas/index.ts
index 9505dc9c7..9ad40310f 100644
--- a/packages/rulesets/src/oas/index.ts
+++ b/packages/rulesets/src/oas/index.ts
@@ -159,7 +159,7 @@ const ruleset = {
       severity: 'warn',
       recommended: true,
       message: '{{error}}',
-      given: ["$..[?(@property !== 'properties' && @.enum && @.enum.constructor.name === 'Array')]"],
+      given: ["$..[?(@property !== 'properties' && @ != null && @.enum && @.enum.constructor.name === 'Array')]"],
       then: {
         field: 'enum',
         function: oasSchema,