diff --git a/surfsense_web/lib/apis/base-api.service.ts b/surfsense_web/lib/apis/base-api.service.ts
index 31341a9e6..872c885d9 100644
--- a/surfsense_web/lib/apis/base-api.service.ts
+++ b/surfsense_web/lib/apis/base-api.service.ts
@@ -10,6 +10,7 @@ import {
 	AuthorizationError,
 	NetworkError,
 	NotFoundError,
+	type ValidationFieldError,
 } from "../error";
 
 enum ResponseType {
@@ -165,6 +166,9 @@ class BaseApiService {
 				const requestId: string | undefined =
 					envelope?.request_id ?? response.headers.get("X-Request-ID") ?? undefined;
 				const reportUrl: string | undefined = envelope?.report_url;
+				const validationFields: ValidationFieldError[] | undefined = Array.isArray(envelope?.fields)
+					? envelope.fields
+					: undefined;
 
 				// Handle 401 - try to refresh token first (only once)
 				if (response.status === 401) {
@@ -209,8 +213,8 @@ class BaseApiService {
 							response.status,
 							response.statusText
 						);
-					default:
-						throw new AppError(
+					default: {
+						const appError = new AppError(
 							errorMessage || "Something went wrong",
 							response.status,
 							response.statusText,
@@ -218,6 +222,9 @@ class BaseApiService {
 							requestId,
 							reportUrl
 						);
+						appError.fields = validationFields;
+						throw appError;
+					}
 				}
 			}
 			refreshRetryBlockedUntil.delete(getRefreshRetryKey(mergedOptions.method, url));
diff --git a/surfsense_web/lib/error.ts b/surfsense_web/lib/error.ts
index 10cb3706e..8c87007b8 100644
--- a/surfsense_web/lib/error.ts
+++ b/surfsense_web/lib/error.ts
@@ -1,11 +1,19 @@
 export const SURFSENSE_ISSUES_URL = "https://github.com/MODSetter/SurfSense/issues";
 
+/** One field-level failure from a 422 validation response. */
+export interface ValidationFieldError {
+	loc: string[];
+	msg: string;
+}
+
 export class AppError extends Error {
 	status?: number;
 	statusText?: string;
 	code?: string;
 	requestId?: string;
 	reportUrl?: string;
+	/** Per-field failures from a 422 response, keyed by their location path. */
+	fields?: ValidationFieldError[];
 	constructor(
 		message: string,
 		status?: number,