diff --git a/packages/unity-bootstrap-theme/src/scss/extends/_anchor-menu.scss b/packages/unity-bootstrap-theme/src/scss/extends/_anchor-menu.scss
index 138af3579e..7d328e7328 100644
--- a/packages/unity-bootstrap-theme/src/scss/extends/_anchor-menu.scss
+++ b/packages/unity-bootstrap-theme/src/scss/extends/_anchor-menu.scss
@@ -158,6 +158,17 @@
     display: flex;
     justify-content: space-between;
   }
+
+  // WCAG 1.4.10 Reflow: cap the sticky menu to the viewport and allow
+  // internal scrolling so every link stays reachable in mobile landscape.
+  // -attached is the class the JS actually applies when scrolling makes the
+  // navbar stick; -sticky is kept for external consumers that may apply it.
+  .uds-anchor-menu.uds-anchor-menu-attached,
+  .uds-anchor-menu.uds-anchor-menu-sticky {
+    max-height: 100vh;
+    max-height: 100dvh;
+    overflow-y: auto;
+  }
 }
 
 @include media-breakpoint-up(xl) {
diff --git a/packages/unity-react-core/src/components/AnchorMenu/AnchorMenu.styles.js b/packages/unity-react-core/src/components/AnchorMenu/AnchorMenu.styles.js
index 64cd9a6e98..2bf6fa8d4a 100644
--- a/packages/unity-react-core/src/components/AnchorMenu/AnchorMenu.styles.js
+++ b/packages/unity-react-core/src/components/AnchorMenu/AnchorMenu.styles.js
@@ -6,6 +6,12 @@ const AnchorMenuWrapper = styled.div`
     top: var(--uds-anchor-menu-top, 0px);
     left: 0;
     width: 100%;
+
+    @media (max-width: 991.98px) {
+      max-height: 100vh;
+      max-height: calc(100dvh - var(--uds-anchor-menu-top, 0px));
+      overflow-y: auto;
+    }
   }
   .mobile-menu-toggler {
     background-color: transparent;