diff --git a/packages/pluggableWidgets/combobox-web/CHANGELOG.md b/packages/pluggableWidgets/combobox-web/CHANGELOG.md
index 1a970c9dd4..c8c3386633 100644
--- a/packages/pluggableWidgets/combobox-web/CHANGELOG.md
+++ b/packages/pluggableWidgets/combobox-web/CHANGELOG.md
@@ -6,6 +6,10 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 
 ## [Unreleased]
 
+### Fixed
+
+- We fixed an issue where validation was not connected to combobox, causing issues for screenreaders.
+
 ## [2.6.0] - 2025-09-26
 
 ### Changed
diff --git a/packages/pluggableWidgets/combobox-web/src/components/ComboboxWrapper.tsx b/packages/pluggableWidgets/combobox-web/src/components/ComboboxWrapper.tsx
index fcb8b380b2..7138d396ba 100644
--- a/packages/pluggableWidgets/combobox-web/src/components/ComboboxWrapper.tsx
+++ b/packages/pluggableWidgets/combobox-web/src/components/ComboboxWrapper.tsx
@@ -14,8 +14,8 @@ interface ComboboxWrapperProps extends PropsWithChildren {
     validation?: string;
     isLoading: boolean;
     isMultiselectActive?: boolean;
+    errorId?: string;
 }
-
 export const ComboboxWrapper = forwardRef(
     (props: ComboboxWrapperProps, ref: RefObject<HTMLDivElement>): ReactElement => {
         const {
@@ -26,7 +26,8 @@ export const ComboboxWrapper = forwardRef(
             validation,
             children,
             isLoading,
-            isMultiselectActive
+            isMultiselectActive,
+            errorId
         } = props;
         const { id, onClick } = getToggleButtonProps();
 
@@ -56,7 +57,7 @@ export const ComboboxWrapper = forwardRef(
                         </div>
                     )}
                 </div>
-                {validation && <ValidationAlert>{validation}</ValidationAlert>}
+                {validation && <ValidationAlert id={errorId}>{validation}</ValidationAlert>}
             </Fragment>
         );
     }
diff --git a/packages/pluggableWidgets/combobox-web/src/components/MultiSelection/MultiSelection.tsx b/packages/pluggableWidgets/combobox-web/src/components/MultiSelection/MultiSelection.tsx
index baa56c606d..e16176c1bd 100644
--- a/packages/pluggableWidgets/combobox-web/src/components/MultiSelection/MultiSelection.tsx
+++ b/packages/pluggableWidgets/combobox-web/src/components/MultiSelection/MultiSelection.tsx
@@ -2,7 +2,7 @@ import classNames from "classnames";
 import { createElement, Fragment, KeyboardEvent, ReactElement, useMemo, useRef } from "react";
 import { ClearButton } from "../../assets/icons";
 import { MultiSelector, SelectionBaseProps } from "../../helpers/types";
-import { getInputLabel, getSelectedCaptionsPlaceholder } from "../../helpers/utils";
+import { getInputLabel, getSelectedCaptionsPlaceholder, getValidationErrorId } from "../../helpers/utils";
 import { useDownshiftMultiSelectProps } from "../../hooks/useDownshiftMultiSelectProps";
 import { useLazyLoading } from "../../hooks/useLazyLoading";
 import { ComboboxWrapper } from "../ComboboxWrapper";
@@ -38,6 +38,7 @@ export function MultiSelection({
     const isSelectedItemsBoxStyle = selector.selectedItemsStyle === "boxes";
     const isOptionsSelected = selector.isOptionsSelected();
     const inputLabel = getInputLabel(options.inputId);
+    const errorId = getValidationErrorId(options.inputId);
     const hasLabel = useMemo(() => Boolean(inputLabel), [inputLabel]);
     const inputProps = getInputProps({
         ...getDropdownProps(
@@ -96,6 +97,7 @@ export function MultiSelection({
                 validation={selector.validation}
                 isLoading={lazyLoading && selector.options.isLoading}
                 isMultiselectActive={selectedItems?.length > 0}
+                errorId={errorId}
             >
                 <div
                     className={classNames(
@@ -139,6 +141,8 @@ export function MultiSelection({
                         placeholder=" "
                         {...inputProps}
                         aria-labelledby={hasLabel ? inputProps["aria-labelledby"] : undefined}
+                        aria-describedby={selector.validation ? errorId : undefined}
+                        aria-invalid={selector.validation ? true : undefined}
                     />
                     <InputPlaceholder isEmpty={selectedItems.length <= 0}>{memoizedselectedCaptions}</InputPlaceholder>
                 </div>
diff --git a/packages/pluggableWidgets/combobox-web/src/components/SingleSelection/SingleSelection.tsx b/packages/pluggableWidgets/combobox-web/src/components/SingleSelection/SingleSelection.tsx
index 3e23bee840..e81642d1a2 100644
--- a/packages/pluggableWidgets/combobox-web/src/components/SingleSelection/SingleSelection.tsx
+++ b/packages/pluggableWidgets/combobox-web/src/components/SingleSelection/SingleSelection.tsx
@@ -2,7 +2,7 @@ import classNames from "classnames";
 import { createElement, Fragment, ReactElement, useMemo, useRef } from "react";
 import { ClearButton } from "../../assets/icons";
 import { SelectionBaseProps, SingleSelector } from "../../helpers/types";
-import { getInputLabel } from "../../helpers/utils";
+import { getInputLabel, getValidationErrorId } from "../../helpers/utils";
 import { useDownshiftSingleSelectProps } from "../../hooks/useDownshiftSingleSelectProps";
 import { useLazyLoading } from "../../hooks/useLazyLoading";
 import { ComboboxWrapper } from "../ComboboxWrapper";
@@ -57,6 +57,7 @@ export function SingleSelection({
     );
 
     const inputLabel = getInputLabel(options.inputId);
+    const errorId = getValidationErrorId(options.inputId);
     const hasLabel = useMemo(() => Boolean(inputLabel), [inputLabel]);
 
     const inputProps = getInputProps(
@@ -69,7 +70,6 @@ export function SingleSelection({
         },
         { suppressRefError: true }
     );
-
     return (
         <Fragment>
             <ComboboxWrapper
@@ -79,6 +79,7 @@ export function SingleSelection({
                 getToggleButtonProps={getToggleButtonProps}
                 validation={selector.validation}
                 isLoading={lazyLoading && selector.options.isLoading}
+                errorId={errorId}
             >
                 <div
                     className={classNames("widget-combobox-selected-items", {
@@ -93,6 +94,8 @@ export function SingleSelection({
                         {...inputProps}
                         placeholder=" "
                         aria-labelledby={hasLabel ? inputProps["aria-labelledby"] : undefined}
+                        aria-describedby={selector.validation ? errorId : undefined}
+                        aria-invalid={selector.validation ? true : undefined}
                     />
                     <InputPlaceholder
                         isEmpty={!selector.currentId || !selector.caption.render(selectedItem, "label")}
diff --git a/packages/pluggableWidgets/combobox-web/src/helpers/utils.ts b/packages/pluggableWidgets/combobox-web/src/helpers/utils.ts
index aa48dba332..51dd54cd62 100644
--- a/packages/pluggableWidgets/combobox-web/src/helpers/utils.ts
+++ b/packages/pluggableWidgets/combobox-web/src/helpers/utils.ts
@@ -153,3 +153,7 @@ function sortSelections(
 export function getInputLabel(inputId: string): Element | null {
     return document.querySelector(`label[for="${inputId}"]`);
 }
+
+export function getValidationErrorId(inputId?: string): string | undefined {
+    return inputId ? inputId + "-validation-message" : undefined;
+}
diff --git a/packages/shared/widget-plugin-component-kit/src/Alert.tsx b/packages/shared/widget-plugin-component-kit/src/Alert.tsx
index 81c6f80162..c7b1485018 100644
--- a/packages/shared/widget-plugin-component-kit/src/Alert.tsx
+++ b/packages/shared/widget-plugin-component-kit/src/Alert.tsx
@@ -5,24 +5,26 @@ export interface AlertProps {
     children?: ReactNode;
     className?: string;
     bootstrapStyle: "default" | "primary" | "success" | "info" | "warning" | "danger";
+    id?: string;
     role?: string;
 }
 
 export interface ValidationAlertProps {
     children?: ReactNode;
     className?: string;
+    id?: string;
 }
 
 // cloning from https://gitlab.rnd.mendix.com/appdev/appdev/-/blob/master/client/src/widgets/web/helpers/Alert.tsx
-export const ValidationAlert = ({ className, children }: ValidationAlertProps): ReactElement => (
-    <Alert className={classNames("mx-validation-message", className)} bootstrapStyle="danger" role="alert">
+export const ValidationAlert = ({ className, children, id }: ValidationAlertProps): ReactElement => (
+    <Alert className={classNames("mx-validation-message", className)} bootstrapStyle="danger" role="alert" id={id}>
         {children}
     </Alert>
 );
 
-export const Alert = ({ className, bootstrapStyle, children, role }: AlertProps): ReactNode =>
+export const Alert = ({ className, bootstrapStyle, children, role, id }: AlertProps): ReactNode =>
     Children.count(children) > 0 ? (
-        <div className={classNames(`alert alert-${bootstrapStyle}`, className)} role={role}>
+        <div className={classNames(`alert alert-${bootstrapStyle}`, className)} role={role} id={id}>
             {children}
         </div>
     ) : null;