diff --git a/packages/core-components/src/layout/SignInPage/SignInPage.tsx b/packages/core-components/src/layout/SignInPage/SignInPage.tsx
index 8e1249f83e..c3139f9316 100644
--- a/packages/core-components/src/layout/SignInPage/SignInPage.tsx
+++ b/packages/core-components/src/layout/SignInPage/SignInPage.tsx
@@ -167,7 +167,7 @@ export const SingleSignInPage = ({
 
   useMountEffect(() => {
     if (errorParam) {
-      setError(new Error(decodeURIComponent(errorParam)));
+      setError(new Error(errorParam));
     }
     login({ checkExisting: true });
   });
diff --git a/packages/core-components/src/layout/SignInPage/providers.tsx b/packages/core-components/src/layout/SignInPage/providers.tsx
index 9cb2fa3c9f..c1c3b744c1 100644
--- a/packages/core-components/src/layout/SignInPage/providers.tsx
+++ b/packages/core-components/src/layout/SignInPage/providers.tsx
@@ -101,10 +101,7 @@ export const useSignInProviders = (
     const errorParam = searchParams.get('error');
     if (errorParam) {
       errorApi.post(
-        new ForwardedError(t('signIn.loginFailed'), {
-          name: 'Error',
-          message: decodeURIComponent(errorParam),
-        }),
+        new ForwardedError(t('signIn.loginFailed'), new Error(errorParam)),
       );
     }
   });
diff --git a/plugins/auth-node/src/oauth/createOAuthRouteHandlers.test.ts b/plugins/auth-node/src/oauth/createOAuthRouteHandlers.test.ts
index e2155df444..edf816cbee 100644
--- a/plugins/auth-node/src/oauth/createOAuthRouteHandlers.test.ts
+++ b/plugins/auth-node/src/oauth/createOAuthRouteHandlers.test.ts
@@ -768,9 +768,7 @@ describe('createOAuthRouteHandlers', () => {
 
       // Verify that the 'error' search param is set with the encoded error message
       const errorMessage = redirectUrl.searchParams.get('error');
-      expect(errorMessage).toBe(
-        encodeURIComponent('Auth response is missing cookie nonce'),
-      );
+      expect(errorMessage).toBe('Auth response is missing cookie nonce');
     });
   });
 });
diff --git a/plugins/auth-node/src/oauth/createOAuthRouteHandlers.ts b/plugins/auth-node/src/oauth/createOAuthRouteHandlers.ts
index 46f8fc3eca..53ae4101d3 100644
--- a/plugins/auth-node/src/oauth/createOAuthRouteHandlers.ts
+++ b/plugins/auth-node/src/oauth/createOAuthRouteHandlers.ts
@@ -252,7 +252,7 @@ export function createOAuthRouteHandlers<TProfile>(
 
         if (state?.flow === 'redirect' && state?.redirectUrl) {
           const redirectUrl = new URL(state.redirectUrl);
-          redirectUrl.searchParams.set('error', encodeURIComponent(message));
+          redirectUrl.searchParams.set('error', message);
 
           // set the error in a cookie and redirect user back to sign in where the error can be rendered
           res.redirect(redirectUrl.toString());