diff --git a/src/main/java/org/prebid/server/bidder/taboola/TaboolaBidder.java b/src/main/java/org/prebid/server/bidder/taboola/TaboolaBidder.java
index c33ef88b520..cbd180f2e6f 100644
--- a/src/main/java/org/prebid/server/bidder/taboola/TaboolaBidder.java
+++ b/src/main/java/org/prebid/server/bidder/taboola/TaboolaBidder.java
@@ -2,6 +2,7 @@
 
 import com.fasterxml.jackson.core.type.TypeReference;
 import com.fasterxml.jackson.databind.node.ObjectNode;
+import com.iab.openrtb.request.App;
 import com.iab.openrtb.request.Banner;
 import com.iab.openrtb.request.BidRequest;
 import com.iab.openrtb.request.Imp;
@@ -151,13 +152,24 @@ private BidRequest createRequest(BidRequest request, List<Imp> imps, ExtImpTaboo
         final List<String> impExtBCat = impExt.getBCat();
         final String impExtPageType = impExt.getPageType();
 
-        final Site site = Optional.ofNullable(request.getSite())
-                .map(Site::toBuilder)
-                .orElseGet(Site::builder)
+        final Publisher publisher = Publisher.builder().id(impExtPublisherId).build();
+
+        final Site site = request.getSite();
+        final Site modifiedSite = site == null
+                ? null
+                : site.toBuilder()
                 .id(impExtPublisherId)
                 .name(impExtPublisherId)
                 .domain(resolveDomain(impExt.getPublisherDomain(), request))
-                .publisher(Publisher.builder().id(impExtPublisherId).build())
+                .publisher(publisher)
+                .build();
+
+        final App app = request.getApp();
+        final App modifiedApp = app == null
+                ? null
+                : app.toBuilder()
+                .id(impExtPublisherId)
+                .publisher(publisher)
                 .build();
 
         final ExtRequest extRequest = StringUtils.isNotEmpty(impExtPageType)
@@ -166,7 +178,8 @@ private BidRequest createRequest(BidRequest request, List<Imp> imps, ExtImpTaboo
 
         return request.toBuilder()
                 .imp(imps)
-                .site(site)
+                .site(modifiedSite)
+                .app(modifiedApp)
                 .badv(CollectionUtils.isNotEmpty(impExtBAdv) ? impExtBAdv : request.getBadv())
                 .bcat(CollectionUtils.isNotEmpty(impExtBCat) ? impExtBCat : request.getBcat())
                 .ext(extRequest)
@@ -189,11 +202,11 @@ private ExtRequest createExtRequest(String pageType) {
 
     private HttpRequest<BidRequest> createHttpRequest(MediaType type, BidRequest outgoingRequest) {
         return BidderUtil.defaultRequest(outgoingRequest,
-                buildEndpointUrl(outgoingRequest.getSite().getId(), type),
+                buildEndpointUrl(outgoingRequest, type),
                 mapper);
     }
 
-    private String buildEndpointUrl(String publisherId, MediaType mediaType) {
+    private String buildEndpointUrl(BidRequest bidRequest, MediaType mediaType) {
         final String type = switch (mediaType) {
             case BANNER -> DISPLAY_ENDPOINT_PREFIX;
             case NATIVE -> NATIVE_ENDPOINT_PREFIX;
@@ -202,6 +215,10 @@ private String buildEndpointUrl(String publisherId, MediaType mediaType) {
             default -> throw new AssertionError();
         };
 
+        final String publisherId = Optional.ofNullable(bidRequest.getSite()).map(Site::getId)
+                .or(() -> Optional.ofNullable(bidRequest.getApp()).map(App::getId))
+                .orElse(StringUtils.EMPTY);
+
         return endpointTemplate
                 .replace("{{GvlID}}", gvlId)
                 .replace("{{MediaType}}", type)
diff --git a/src/test/java/org/prebid/server/bidder/taboola/TaboolaBidderTest.java b/src/test/java/org/prebid/server/bidder/taboola/TaboolaBidderTest.java
index 4406373d114..a185687bb5f 100644
--- a/src/test/java/org/prebid/server/bidder/taboola/TaboolaBidderTest.java
+++ b/src/test/java/org/prebid/server/bidder/taboola/TaboolaBidderTest.java
@@ -3,6 +3,7 @@
 import com.fasterxml.jackson.core.JsonProcessingException;
 import com.fasterxml.jackson.databind.JsonNode;
 import com.fasterxml.jackson.databind.node.TextNode;
+import com.iab.openrtb.request.App;
 import com.iab.openrtb.request.Audio;
 import com.iab.openrtb.request.Banner;
 import com.iab.openrtb.request.BidRequest;
@@ -337,6 +338,7 @@ public void makeHttpRequestsShouldModifyExtIfImpExtPageTypeIsNotEmpty() {
     public void makeHttpRequestShouldContainProperUriWhenTypeIsBanner() {
         // given
         final BidRequest bidRequest = givenBidRequest(
+                request -> request.site(Site.builder().build()),
                 givenBannerImp(identity(), ext -> ext.publisherId("publisherId")));
 
         // when
@@ -353,6 +355,7 @@ public void makeHttpRequestShouldContainProperUriWhenTypeIsBanner() {
     public void makeHttpRequestShouldContainProperUriWithEncodedPublisherId() {
         // given
         final BidRequest bidRequest = givenBidRequest(
+                request -> request.app(App.builder().build()),
                 givenBannerImp(identity(), extImp -> extImp.publisherId("not/encoded")));
 
         // when
@@ -369,6 +372,7 @@ public void makeHttpRequestShouldContainProperUriWithEncodedPublisherId() {
     public void makeHttpRequestShouldContainProperUriWhenTypeIsNative() {
         // given
         final BidRequest bidRequest = givenBidRequest(
+                request -> request.app(App.builder().build()),
                 givenImp(imp -> imp.xNative(Native.builder().build()), ext -> ext.publisherId("publisherId")));
 
         // when
@@ -411,30 +415,38 @@ public void makeHttpRequestShouldModifySiteDependsOnExtPublisherId() {
     }
 
     @Test
-    public void makeHttpRequestShouldModifySiteDomainIfExtPublisherDomainIsNotEmpty() {
+    public void makeHttpRequestShouldModifyAppDependsOnExtPublisherId() {
         // given
+        final App givenApp = App.builder()
+                .id("id")
+                .publisher(Publisher.builder().id("id").build())
+                .build();
+
         final BidRequest bidRequest = givenBidRequest(
-                request -> request.site(Site.builder().domain("domain").build()),
-                givenBannerImp(identity(), ext -> ext.publisherDomain("extDomain")));
+                request -> request.app(givenApp),
+                givenBannerImp(identity(), ext -> ext.publisherId("extPublisherId")));
 
         // when
         final Result<List<HttpRequest<BidRequest>>> result = target.makeHttpRequests(bidRequest);
 
         // then
+        final App expectedApp = givenApp.toBuilder()
+                .publisher(Publisher.builder().id("extPublisherId").build())
+                .id("extPublisherId")
+                .build();
         assertThat(result.getErrors()).isEmpty();
         assertThat(result.getValue())
                 .extracting(HttpRequest::getPayload)
-                .extracting(BidRequest::getSite)
-                .extracting(Site::getDomain)
-                .containsExactly("extDomain");
+                .extracting(BidRequest::getApp)
+                .containsOnly(expectedApp);
     }
 
     @Test
-    public void makeHttpRequestShouldNotModifySiteDomainIfExtPublisherDomainIsEmpty() {
+    public void makeHttpRequestShouldModifySiteDomainIfExtPublisherDomainIsNotEmpty() {
         // given
         final BidRequest bidRequest = givenBidRequest(
                 request -> request.site(Site.builder().domain("domain").build()),
-                givenBannerImp(identity(), ext -> ext.publisherDomain("")));
+                givenBannerImp(identity(), ext -> ext.publisherDomain("extDomain")));
 
         // when
         final Result<List<HttpRequest<BidRequest>>> result = target.makeHttpRequests(bidRequest);
@@ -445,15 +457,15 @@ public void makeHttpRequestShouldNotModifySiteDomainIfExtPublisherDomainIsEmpty(
                 .extracting(HttpRequest::getPayload)
                 .extracting(BidRequest::getSite)
                 .extracting(Site::getDomain)
-                .containsExactly("domain");
+                .containsExactly("extDomain");
     }
 
     @Test
-    public void makeHttpRequestShouldAddEmptyDomainIfNoOtherSources() {
+    public void makeHttpRequestShouldNotModifySiteDomainIfExtPublisherDomainIsEmpty() {
         // given
         final BidRequest bidRequest = givenBidRequest(
-                request -> request.site(Site.builder().build()),
-                givenBannerImp(identity(), identity()));
+                request -> request.site(Site.builder().domain("domain").build()),
+                givenBannerImp(identity(), ext -> ext.publisherDomain("")));
 
         // when
         final Result<List<HttpRequest<BidRequest>>> result = target.makeHttpRequests(bidRequest);
@@ -464,13 +476,15 @@ public void makeHttpRequestShouldAddEmptyDomainIfNoOtherSources() {
                 .extracting(HttpRequest::getPayload)
                 .extracting(BidRequest::getSite)
                 .extracting(Site::getDomain)
-                .containsExactly("");
+                .containsExactly("domain");
     }
 
     @Test
-    public void makeHttpRequestShouldCreateSiteIfNotPresent() {
+    public void makeHttpRequestShouldAddEmptyDomainIfNoOtherSources() {
         // given
-        final BidRequest bidRequest = givenBidRequest(givenBannerImp(identity(), identity()));
+        final BidRequest bidRequest = givenBidRequest(
+                request -> request.site(Site.builder().build()),
+                givenBannerImp(identity(), identity()));
 
         // when
         final Result<List<HttpRequest<BidRequest>>> result = target.makeHttpRequests(bidRequest);
@@ -480,13 +494,15 @@ public void makeHttpRequestShouldCreateSiteIfNotPresent() {
         assertThat(result.getValue())
                 .extracting(HttpRequest::getPayload)
                 .extracting(BidRequest::getSite)
-                .doesNotContainNull();
+                .extracting(Site::getDomain)
+                .containsExactly("");
     }
 
     @Test
     public void makeHttpRequestShouldUseDataFromLastImpExtForRequest() {
         // given
         final BidRequest bidRequest = givenBidRequest(
+                request -> request.site(Site.builder().build()),
                 givenBannerImp(identity(), ext -> ext.publisherId("1")),
                 givenBannerImp(identity(), ext -> ext.publisherId("2")));