diff --git a/modules/openapi-generator/src/main/resources/typescript-fetch/validationAttributes.mustache b/modules/openapi-generator/src/main/resources/typescript-fetch/validationAttributes.mustache
index 7ddff376299f..6dddc042bac0 100644
--- a/modules/openapi-generator/src/main/resources/typescript-fetch/validationAttributes.mustache
+++ b/modules/openapi-generator/src/main/resources/typescript-fetch/validationAttributes.mustache
@@ -25,7 +25,7 @@ export const {{classname}}PropertyValidationAttributesMap: {
         minLength: {{minLength}},
         {{/minLength}}
         {{#pattern}}
-        pattern: '{{pattern}}',
+        pattern: '{{{pattern}}}',
         {{/pattern}}
         {{#maximum}}
         maximum: {{maximum}},
diff --git a/modules/openapi-generator/src/test/java/org/openapitools/codegen/typescript/fetch/TypeScriptFetchClientCodegenTest.java b/modules/openapi-generator/src/test/java/org/openapitools/codegen/typescript/fetch/TypeScriptFetchClientCodegenTest.java
index bb63f62225ea..da183535f3ad 100644
--- a/modules/openapi-generator/src/test/java/org/openapitools/codegen/typescript/fetch/TypeScriptFetchClientCodegenTest.java
+++ b/modules/openapi-generator/src/test/java/org/openapitools/codegen/typescript/fetch/TypeScriptFetchClientCodegenTest.java
@@ -459,6 +459,19 @@ public void testValidationAttributesWithWithoutRuntimeChecks() throws IOExceptio
         TestUtils.assertFileContains(modelsIndex, "[property: string]:");
     }
 
+    @Test(description = "Verify pattern is not HTML-escaped in validationAttributes")
+    public void testValidationAttributesPatternIsNotHtmlEscaped() throws IOException {
+        Map<String, Object> properties = new HashMap<>();
+        properties.put(TypeScriptFetchClientCodegen.VALIDATION_ATTRIBUTES, true);
+        properties.put(TypeScriptFetchClientCodegen.WITHOUT_RUNTIME_CHECKS, true);
+
+        File output = generate(properties, "src/test/resources/3_0/typescript-fetch/validation-attributes.yaml");
+
+        Path modelsIndex = Paths.get(output + "/models/index.ts");
+        TestUtils.assertFileNotContains(modelsIndex, "pattern: '/^[a-z&amp;]+$/'");
+        TestUtils.assertFileContains(modelsIndex, "pattern: '/^[a-z&]+$/'");
+    }
+
     @Test(description = "Verify withRequestOptsInInterface=true (default) includes RequestOpts in interface")
     public void testRequestOptsInInterfaceByDefault() throws IOException {
         Map<String, Object> properties = new HashMap<>();
diff --git a/modules/openapi-generator/src/test/resources/3_0/typescript-fetch/validation-attributes.yaml b/modules/openapi-generator/src/test/resources/3_0/typescript-fetch/validation-attributes.yaml
index f8bbf01a83f7..76eb1bb9885c 100644
--- a/modules/openapi-generator/src/test/resources/3_0/typescript-fetch/validation-attributes.yaml
+++ b/modules/openapi-generator/src/test/resources/3_0/typescript-fetch/validation-attributes.yaml
@@ -675,6 +675,9 @@ components:
           maxLength: 256
         phone:
           type: string
+        nickname:
+          type: string
+          pattern: '^[a-z&]+$'
         userStatus:
           type: integer
           format: int32
diff --git a/samples/client/petstore/typescript-fetch/builds/validation-attributes/docs/User.md b/samples/client/petstore/typescript-fetch/builds/validation-attributes/docs/User.md
index af455b7cf7b2..4675e2b7b1d0 100644
--- a/samples/client/petstore/typescript-fetch/builds/validation-attributes/docs/User.md
+++ b/samples/client/petstore/typescript-fetch/builds/validation-attributes/docs/User.md
@@ -14,6 +14,7 @@ Name | Type
 `email` | string
 `password` | string
 `phone` | string
+`nickname` | string
 `userStatus` | number
 
 ## Example
@@ -30,6 +31,7 @@ const example = {
   "email": null,
   "password": null,
   "phone": null,
+  "nickname": null,
   "userStatus": null,
 } satisfies User
 
diff --git a/samples/client/petstore/typescript-fetch/builds/validation-attributes/models/User.ts b/samples/client/petstore/typescript-fetch/builds/validation-attributes/models/User.ts
index fd515e217965..14cdd264cac7 100644
--- a/samples/client/petstore/typescript-fetch/builds/validation-attributes/models/User.ts
+++ b/samples/client/petstore/typescript-fetch/builds/validation-attributes/models/User.ts
@@ -61,6 +61,12 @@ export interface User {
      * @memberof User
      */
     phone?: string;
+    /**
+     * 
+     * @type {string}
+     * @memberof User
+     */
+    nickname?: string;
     /**
      * User Status
      * @type {number}
@@ -87,6 +93,9 @@ export const UserPropertyValidationAttributesMap: {
         maxLength: 256,
         minLength: 8,
     },
+    nickname: {
+        pattern: '/^[a-z&]+$/',
+    },
     userStatus: {
         maximum: 100,
         exclusiveMaximum: true,
@@ -121,6 +130,7 @@ export function UserFromJSONTyped(json: any, ignoreDiscriminator: boolean): User
         'email': json['email'] == null ? undefined : json['email'],
         'password': json['password'] == null ? undefined : json['password'],
         'phone': json['phone'] == null ? undefined : json['phone'],
+        'nickname': json['nickname'] == null ? undefined : json['nickname'],
         'userStatus': json['userStatus'] == null ? undefined : json['userStatus'],
     };
 }
@@ -143,6 +153,7 @@ export function UserToJSONTyped(value?: User | null, ignoreDiscriminator: boolea
         'email': value['email'],
         'password': value['password'],
         'phone': value['phone'],
+        'nickname': value['nickname'],
         'userStatus': value['userStatus'],
     };
 }