diff --git a/apps/main/src/dex/components/MonadBannerAlert.tsx b/apps/main/src/dex/components/MonadBannerAlert.tsx
index 2052a63fb3..bb069672ce 100644
--- a/apps/main/src/dex/components/MonadBannerAlert.tsx
+++ b/apps/main/src/dex/components/MonadBannerAlert.tsx
@@ -1,6 +1,6 @@
-import { Banner } from '@ui-kit/shared/ui/Banner'
 import { Stack } from '@mui/material'
 import { t } from '@ui-kit/lib/i18n'
+import { Banner } from '@ui-kit/shared/ui/Banner'
 import { PoolUrlParams } from '../types/main.types'
 
 const MonadBannerAlert = ({ params }: { params: PoolUrlParams }) => {
diff --git a/apps/main/src/dex/components/PagePool/index.tsx b/apps/main/src/dex/components/PagePool/index.tsx
index b27745e184..2fb5ad3140 100644
--- a/apps/main/src/dex/components/PagePool/index.tsx
+++ b/apps/main/src/dex/components/PagePool/index.tsx
@@ -17,10 +17,10 @@ import usePoolAlert from '@/dex/hooks/usePoolAlert'
 import useTokensMapper from '@/dex/hooks/useTokensMapper'
 import { getUserPoolActiveKey } from '@/dex/store/createUserSlice'
 import useStore from '@/dex/store/useStore'
+import type { PoolUrlParams } from '@/dex/types/main.types'
 import { getChainPoolIdActiveKey } from '@/dex/utils'
 import { getPath } from '@/dex/utils/utilsRouter'
 import { ManageGauge } from '@/dex/widgets/manage-gauge'
-import type { PoolUrlParams } from '@/dex/types/main.types'
 import Stack from '@mui/material/Stack'
 import AlertBox from '@ui/AlertBox'
 import { AppFormContentWrapper } from '@ui/AppForm'
diff --git a/packages/curve-ui-kit/src/hooks/useLocalStorage.ts b/packages/curve-ui-kit/src/hooks/useLocalStorage.ts
index 6d1a057fbe..482b5b0c19 100644
--- a/packages/curve-ui-kit/src/hooks/useLocalStorage.ts
+++ b/packages/curve-ui-kit/src/hooks/useLocalStorage.ts
@@ -1,5 +1,5 @@
 import lodash from 'lodash'
-import { useMemo } from 'react'
+import { useCallback, useMemo } from 'react'
 import type { Address } from '@curvefi/prices-api'
 import type { VisibilityVariants } from '@ui-kit/shared/ui/DataTable/visibility.types'
 import { defaultReleaseChannel, ReleaseChannel } from '@ui-kit/utils'
@@ -7,9 +7,6 @@ import { type MigrationOptions, useStoredState } from './useStoredState'
 
 const { kebabCase } = lodash
 
-// old keys that are not used anymore - clean them up
-window.localStorage.removeItem('phishing-warning-dismissed')
-
 function getFromLocalStorage<T>(storageKey: string): T | null {
   if (typeof window === 'undefined') {
     return null
@@ -72,3 +69,18 @@ export const useFavoriteMarkets = () => {
   const initialValue = useMemo(() => [], [])
   return useLocalStorage<Address[]>('favoriteMarkets', initialValue)
 }
+
+export const useDismissBanner = (bannerKey: string, expirationTime: number) => {
+  const [dismissedAt, setDismissedAt] = useLocalStorage<number | null>(bannerKey, null)
+
+  const shouldShowBanner = useMemo(
+    () => dismissedAt == null || Date.now() - dismissedAt >= expirationTime, // Show if dismissed more than the expiration time
+    [dismissedAt, expirationTime],
+  )
+
+  const dismissBanner = useCallback(() => {
+    setDismissedAt(Date.now())
+  }, [setDismissedAt])
+
+  return { shouldShowBanner, dismissBanner }
+}
diff --git a/packages/curve-ui-kit/src/shared/ui/Banner.tsx b/packages/curve-ui-kit/src/shared/ui/Banner.tsx
index 191e8fcb16..76275a8bf3 100644
--- a/packages/curve-ui-kit/src/shared/ui/Banner.tsx
+++ b/packages/curve-ui-kit/src/shared/ui/Banner.tsx
@@ -6,88 +6,80 @@ import Card from '@mui/material/Card'
 import IconButton from '@mui/material/IconButton'
 import LinkMui from '@mui/material/Link'
 import Stack from '@mui/material/Stack'
-import Typography, { type TypographyProps } from '@mui/material/Typography'
+import Typography from '@mui/material/Typography'
 import { t } from '@ui-kit/lib/i18n'
 import { ArrowTopRightIcon } from '@ui-kit/shared/icons/ArrowTopRightIcon'
 import { SizesAndSpaces } from '@ui-kit/themes/design/1_sizes_spaces'
-import { ChangeTheme, InvertTheme } from './ThemeProvider'
 
-type BannerSeverity = 'default' | 'highlight' | 'warning' | 'alert'
+type BannerSeverity = 'info' | 'highlight' | 'warning' | 'alert'
 
-const WrapperSx: Record<BannerSeverity, SxProps<Theme>> = {
-  default: {
-    border: (t) => `1px solid ${t.design.Layer.Highlight.Outline}`,
-    backgroundColor: (t) => t.design.Layer[1].Fill,
+const BannerSx: Record<BannerSeverity, { title: SxProps<Theme>; subtitle: SxProps<Theme>; wrapper: SxProps<Theme> }> = {
+  info: {
+    title: { color: (t) => t.design.Text.TextColors.FilledFeedback.Info.Primary },
+    subtitle: { color: (t) => t.design.Text.TextColors.FilledFeedback.Info.Secondary },
+    wrapper: {
+      border: (t) => `1px solid ${t.design.Layer.Highlight.Outline}`,
+      backgroundColor: (t) => t.design.Layer[1].Fill,
+    },
+  },
+  alert: {
+    title: { color: (t) => t.design.Text.TextColors.FilledFeedback.Alert.Primary },
+    subtitle: { color: (t) => t.design.Text.TextColors.FilledFeedback.Alert.Secondary },
+    wrapper: { backgroundColor: (t) => t.design.Layer.Feedback.Error },
+  },
+  warning: {
+    title: { color: (t) => t.design.Text.TextColors.FilledFeedback.Warning.Primary },
+    subtitle: { color: (t) => t.design.Text.TextColors.FilledFeedback.Warning.Secondary },
+    wrapper: { backgroundColor: (t) => t.design.Layer.Feedback.Warning },
   },
   highlight: {
-    border: (t) => `1px solid ${t.design.Layer.Highlight.Outline}`,
-    backgroundColor: (t) => t.design.Color.Primary[800],
+    title: { color: (t) => t.design.Text.TextColors.FilledFeedback.Highlight.Primary },
+    subtitle: { color: (t) => t.design.Text.TextColors.FilledFeedback.Highlight.Secondary },
+    wrapper: { backgroundColor: (t) => t.design.Layer.Feedback.Info },
   },
-  alert: { backgroundColor: (t) => t.design.Layer.Feedback.Error },
-  warning: { backgroundColor: (t) => t.design.Layer.Feedback.Warning },
 }
 
-const TitleColor: Record<BannerSeverity, TypographyProps['color']> = {
-  default: 'textHighlight',
-  alert: 'textPrimary',
-  warning: 'textPrimary',
-  highlight: 'textPrimary',
-}
+const { MaxWidth, Spacing } = SizesAndSpaces
 
-const TitleInverted: Record<BannerSeverity, boolean> = {
-  default: false,
-  alert: true,
-  warning: false,
-  highlight: true,
+export type BannerProps = {
+  onClick?: () => void
+  buttonText?: string
+  children: ReactNode
+  severity?: BannerSeverity
+  learnMoreUrl?: string
+  subtitle?: ReactNode
+  testId?: string
 }
 
-const { MaxWidth, Spacing } = SizesAndSpaces
-
 /**
  * Banner message component used to display important information with different severity levels.
- * This is not complete yet: it doesn't support a subtitle or a close button from the design system.
  */
 export const Banner = ({
   onClick,
   buttonText,
   children,
-  severity = 'default',
+  severity = 'info',
   learnMoreUrl,
-  color,
-}: {
-  onClick?: () => void
-  buttonText?: string
-  children: ReactNode
-  severity?: BannerSeverity
-  learnMoreUrl?: string
-  color?: TypographyProps['color']
-}) => (
+  subtitle,
+  testId,
+}: BannerProps) => (
   <Card
     sx={{
       display: 'flex',
-      gap: Spacing.md,
       alignSelf: 'stretch',
       paddingInline: Spacing.md,
       paddingBlock: Spacing.xs,
-      alignItems: 'center',
       justifyContent: 'center',
-      ...WrapperSx[severity],
+      ...BannerSx[severity].wrapper,
     }}
+    data-testid={testId}
   >
-    <Stack
-      direction="row"
-      sx={{ width: '100%', maxWidth: MaxWidth.banner }}
-      alignItems="center"
-      justifyContent="space-between"
-    >
-      <InvertTheme inverted={TitleInverted[severity]}>
-        <Typography color={color ?? TitleColor[severity]} variant="headingXsBold">
+    <Stack direction="column" width="100%" maxWidth={MaxWidth.banner}>
+      <Stack direction="row" alignItems="center" justifyContent="space-between">
+        <Typography sx={{ ...BannerSx[severity].title }} variant="headingXsBold">
           {children}
         </Typography>
-      </InvertTheme>
-      <Stack direction="row" alignItems="center" justifyContent="start" height="100%">
-        {/* fixme: currently using light theme on dark theme */}
-        <ChangeTheme to={color === '#000' && 'light'}>
+        <Stack direction="row" alignItems="center" justifyContent="start" height="100%">
           {learnMoreUrl && (
             <Button
               component={LinkMui}
@@ -101,6 +93,7 @@ export const Banner = ({
               {t`Learn more`}
             </Button>
           )}
+          {/* TODO: fix button colors */}
           {onClick &&
             (buttonText ? (
               <Button color="ghost" onClick={onClick} size="extraSmall">
@@ -111,7 +104,12 @@ export const Banner = ({
                 <CloseIcon />
               </IconButton>
             ))}
-        </ChangeTheme>
+        </Stack>
+      </Stack>
+      <Stack direction="row" alignItems="center" justifyContent="start" height="100%">
+        <Typography sx={{ ...BannerSx[severity].subtitle }} variant="bodySRegular">
+          {subtitle}
+        </Typography>
       </Stack>
     </Stack>
   </Card>
diff --git a/packages/curve-ui-kit/src/shared/ui/GlobalBanner.tsx b/packages/curve-ui-kit/src/shared/ui/GlobalBanner.tsx
index 6be7f90ee2..b4d095662f 100644
--- a/packages/curve-ui-kit/src/shared/ui/GlobalBanner.tsx
+++ b/packages/curve-ui-kit/src/shared/ui/GlobalBanner.tsx
@@ -1,6 +1,5 @@
 import { useAccount, useChainId, useSwitchChain } from 'wagmi'
 import Box from '@mui/material/Box'
-import { useTheme } from '@mui/material/styles'
 import { isFailure, useConnection, type WagmiChainId } from '@ui-kit/features/connect-wallet'
 import { useReleaseChannel } from '@ui-kit/hooks/useLocalStorage'
 import { t } from '@ui-kit/lib/i18n'
@@ -8,6 +7,7 @@ import { LlamaIcon } from '@ui-kit/shared/icons/LlamaIcon'
 import { Banner } from '@ui-kit/shared/ui/Banner'
 import { SizesAndSpaces } from '@ui-kit/themes/design/1_sizes_spaces'
 import { isCypress, ReleaseChannel } from '@ui-kit/utils'
+import { PhishingWarningBanner } from '@ui-kit/widgets/Header/PhishingWarningBanner'
 
 export type GlobalBannerProps = {
   networkId: string
@@ -27,23 +27,18 @@ export const GlobalBanner = ({ networkId, chainId }: GlobalBannerProps) => {
   const walletChainId = useChainId()
   const showSwitchNetworkMessage = isConnected && chainId && walletChainId != chainId
   const showConnectApiErrorMessage = !showSwitchNetworkMessage && isFailure(connectState)
-  const warnColor = useTheme().palette.mode === 'dark' ? '#000' : 'textSecondary' // todo: fix this in the design system of the alert component
   return (
     <Box>
+      <PhishingWarningBanner />
       {releaseChannel !== ReleaseChannel.Stable && !isCypress && (
         <Banner onClick={() => setReleaseChannel(ReleaseChannel.Stable)} buttonText={t`Disable ${releaseChannel} Mode`}>
           <LlamaIcon sx={{ width: IconSize.sm, height: IconSize.sm }} /> {t`${releaseChannel} Mode Enabled`}
         </Banner>
       )}
-      {maintenanceMessage && (
-        <Banner severity="warning" color={warnColor}>
-          {maintenanceMessage}
-        </Banner>
-      )}
+      {maintenanceMessage && <Banner severity="warning">{maintenanceMessage}</Banner>}
       {showSwitchNetworkMessage && (
         <Banner
           severity="warning"
-          color={warnColor}
           buttonText={t`Change network`}
           onClick={() => switchChain({ chainId: chainId as WagmiChainId })}
         >
diff --git a/packages/curve-ui-kit/src/shared/ui/stories/Banner.stories.tsx b/packages/curve-ui-kit/src/shared/ui/stories/Banner.stories.tsx
index fdbeaebad9..d01b687024 100644
--- a/packages/curve-ui-kit/src/shared/ui/stories/Banner.stories.tsx
+++ b/packages/curve-ui-kit/src/shared/ui/stories/Banner.stories.tsx
@@ -24,7 +24,7 @@ const meta: Meta<typeof Banner> = {
   argTypes: {
     severity: {
       control: 'select',
-      options: ['error', 'warning', 'info'],
+      options: ['error', 'warning', 'info', 'highlight'],
       description: 'The severity level of the banner message',
     },
     buttonText: {
@@ -35,6 +35,10 @@ const meta: Meta<typeof Banner> = {
       action: 'clicked',
       description: 'Function called when the button is clicked',
     },
+    subtitle: {
+      control: 'text',
+      description: 'Subtitle for the banner message (optional)',
+    },
   },
 }
 
@@ -57,7 +61,7 @@ export const Warning: Story = {
 
 export const Info: Story = {
   args: {
-    severity: 'default',
+    severity: 'info',
     children: 'This is a default message',
   },
 }
@@ -112,3 +116,11 @@ export const ApiErrorExample: Story = {
     children: 'There is an issue connecting to the API. Please try to switch your RPC in your wallet settings.',
   },
 }
+
+export const WithSubtitle: Story = {
+  args: {
+    severity: 'info',
+    children: 'This is an default message with a subtitle',
+    subtitle: 'This is a subtitle',
+  },
+}
diff --git a/packages/curve-ui-kit/src/widgets/Header/PhishingWarningBanner.tsx b/packages/curve-ui-kit/src/widgets/Header/PhishingWarningBanner.tsx
new file mode 100644
index 0000000000..b5d3c93880
--- /dev/null
+++ b/packages/curve-ui-kit/src/widgets/Header/PhishingWarningBanner.tsx
@@ -0,0 +1,32 @@
+import { useDismissBanner } from '@ui-kit/hooks/useLocalStorage'
+import { t } from '@ui-kit/lib/i18n'
+import { ExclamationTriangleIcon } from '@ui-kit/shared/icons/ExclamationTriangleIcon'
+import { Banner } from '@ui-kit/shared/ui/Banner'
+import { SizesAndSpaces } from '@ui-kit/themes/design/1_sizes_spaces'
+
+const { IconSize } = SizesAndSpaces
+
+const URL = 'https://www.curve.finance'
+const ONE_MONTH_MS = 30 * 24 * 60 * 60 * 1000 // 30 days in milliseconds
+
+/**
+ * Displays a banner warning users about phishing risks and encourages them to verify they are on the official Curve domains.
+ * The banner will reappear after one month if dismissed.
+ */
+export const PhishingWarningBanner = () => {
+  const { shouldShowBanner, dismissBanner } = useDismissBanner('phishing-warning-dismissed', ONE_MONTH_MS)
+
+  return (
+    shouldShowBanner && (
+      <Banner
+        subtitle={t`Always carefully check that your URL is ${URL}.`}
+        severity="warning"
+        onClick={dismissBanner}
+        testId="phishing-warning-banner"
+      >
+        <ExclamationTriangleIcon sx={{ width: IconSize.sm, height: IconSize.sm, verticalAlign: 'text-bottom' }} />{' '}
+        {t`Make sure you are on the right domain`}
+      </Banner>
+    )
+  )
+}
diff --git a/tests/cypress/e2e/all/header.cy.ts b/tests/cypress/e2e/all/header.cy.ts
index 7f2848d481..be212c90db 100644
--- a/tests/cypress/e2e/all/header.cy.ts
+++ b/tests/cypress/e2e/all/header.cy.ts
@@ -4,6 +4,7 @@ import {
   LOAD_TIMEOUT,
   oneDesktopViewport,
   oneMobileOrTabletViewport,
+  oneViewport,
   SCROLL_WIDTH,
   TABLET_BREAKPOINT,
 } from '@cy/support/ui'
@@ -26,6 +27,7 @@ describe('Header', () => {
     beforeEach(() => {
       viewport = oneDesktopViewport()
       cy.viewport(...viewport)
+      dismissPhishingWarningBanner()
       route = oneAppRoute()
       cy.visitWithoutTestConnector(route)
       waitIsLoaded(route)
@@ -88,6 +90,7 @@ describe('Header', () => {
     beforeEach(() => {
       viewport = oneMobileOrTabletViewport()
       cy.viewport(...viewport)
+      dismissPhishingWarningBanner()
       route = oneAppRoute()
       cy.visitWithoutTestConnector(route)
       waitIsLoaded(route)
@@ -160,6 +163,50 @@ describe('Header', () => {
     })
   })
 
+  describe('Phishing Warning Banner', () => {
+    let route: AppRoute
+
+    beforeEach(() => {
+      const [width, height] = oneViewport()
+      viewport = [width, height]
+      cy.viewport(...viewport)
+      route = oneAppRoute()
+      cy.visitWithoutTestConnector(route)
+      waitIsLoaded(route)
+    })
+
+    it('should display the banner and allow dismissal', () => {
+      cy.get("[data-testid='phishing-warning-banner']").should('be.visible')
+      // Click the banner to dismiss it
+      cy.get("[data-testid='phishing-warning-banner']").find('button').first().click()
+      cy.get("[data-testid='phishing-warning-banner']").should('not.exist')
+    })
+
+    it('should reappear after one month', () => {
+      // Set dismissal date to 31 days ago (more than one month)
+      const oneMonthAgo = Date.now() - 31 * 24 * 60 * 60 * 1000
+      dismissPhishingWarningBanner(oneMonthAgo)
+      cy.reload()
+      waitIsLoaded(route)
+      cy.get("[data-testid='phishing-warning-banner']").should('be.visible')
+    })
+
+    it('should remain hidden within one month', () => {
+      // Set dismissal date to 15 days ago (less than one month)
+      const fifteenDaysAgo = Date.now() - 15 * 24 * 60 * 60 * 1000
+      dismissPhishingWarningBanner(fifteenDaysAgo)
+      cy.reload()
+      waitIsLoaded(route)
+      cy.get("[data-testid='phishing-warning-banner']").should('not.exist')
+    })
+  })
+
+  function dismissPhishingWarningBanner(date?: number) {
+    cy.window().then((win) => {
+      win.localStorage.setItem('phishing-warning-dismissed', JSON.stringify(date ?? Date.now()))
+    })
+  }
+
   function waitIsLoaded(route: AppRoute) {
     cy.get(`[data-testid='${getRouteTestId(route)}']`, API_LOAD_TIMEOUT).should('be.visible')
   }