diff --git a/packages/core/src/errors/RequestError.ts b/packages/core/src/errors/RequestError.ts
index d07d04fb6..c904ccd4e 100644
--- a/packages/core/src/errors/RequestError.ts
+++ b/packages/core/src/errors/RequestError.ts
@@ -4,15 +4,20 @@ export enum GuardErrorCode {
   InvalidInput = 'guard.invalid_input',
 }
 
+export enum OidcErrorCode {
+  Aborted = 'oidc.aborted',
+}
+
 export enum RegisterErrorCode {
   UsernameExists = 'register.username_exists',
 }
 
-export type RequestErrorCode = GuardErrorCode | RegisterErrorCode;
+export type RequestErrorCode = GuardErrorCode | OidcErrorCode | RegisterErrorCode;
 
 const requestErrorMessage: Record<RequestErrorCode, string> = {
-  [RegisterErrorCode.UsernameExists]: 'The username already exists.',
   [GuardErrorCode.InvalidInput]: 'The request input is invalid.',
+  [OidcErrorCode.Aborted]: 'The end-user aborted interaction.',
+  [RegisterErrorCode.UsernameExists]: 'The username already exists.',
 };
 
 export type RequestErrorMetadata = {
diff --git a/packages/core/src/routes/sign-in.ts b/packages/core/src/routes/sign-in.ts
index a88e25526..a81acf206 100644
--- a/packages/core/src/routes/sign-in.ts
+++ b/packages/core/src/routes/sign-in.ts
@@ -6,6 +6,7 @@ import { findUserById } from '@/queries/user';
 import { Provider } from 'oidc-provider';
 import { conditional } from '@logto/essentials';
 import koaGuard from '@/middleware/koa-guard';
+import { OidcErrorCode } from '@/errors/RequestError';
 
 export default function createSignInRoutes(provider: Provider) {
   const router = new Router();
@@ -82,5 +83,13 @@ export default function createSignInRoutes(provider: Provider) {
     ctx.body = { redirectTo };
   });
 
+  router.post('/sign-in/abort', async (ctx) => {
+    await provider.interactionDetails(ctx.req, ctx.res);
+    const redirectTo = await provider.interactionResult(ctx.req, ctx.res, {
+      error: OidcErrorCode.Aborted,
+    });
+    ctx.body = { redirectTo };
+  });
+
   return router.routes();
 }