diff --git a/modules/criteoBidAdapter.js b/modules/criteoBidAdapter.js
index cdf45d550b4..6488ccb746e 100644
--- a/modules/criteoBidAdapter.js
+++ b/modules/criteoBidAdapter.js
@@ -1,4 +1,4 @@
-import { deepAccess, isArray, logError, logInfo, logWarn, parseUrl } from '../src/utils.js';
+import { deepAccess, generateUUID, isArray, logError, logInfo, logWarn, parseUrl } from '../src/utils.js';
 import { loadExternalScript } from '../src/adloader.js';
 import { registerBidder } from '../src/adapters/bidderFactory.js';
 import { config } from '../src/config.js';
@@ -235,7 +235,7 @@ export const spec = {
           bid.meta = Object.assign({}, bid.meta, { advertiserDomains: [slot.adomain].flat() });
         }
         if (slot.ext?.meta?.networkName) {
-          bid.meta = Object.assign({}, bid.meta, {networkName: slot.ext.meta.networkName})
+          bid.meta = Object.assign({}, bid.meta, { networkName: slot.ext.meta.networkName })
         }
         if (slot.native) {
           if (bidRequest.params.nativeCallback) {
@@ -420,6 +420,7 @@ function buildCdbRequest(context, bidRequests, bidderRequest) {
   let schain;
   let userIdAsEids;
   const request = {
+    id: generateUUID(),
     publisher: {
       url: context.url,
       ext: bidderRequest.publisherExt,
@@ -437,9 +438,7 @@ function buildCdbRequest(context, bidRequests, bidderRequest) {
       schain = bidRequest.schain || schain;
       const slot = {
         impid: bidRequest.adUnitCode,
-        transactionid: bidRequest.ortb2Imp?.ext?.tid,
-        // TODO: fix auctionId leak: https://github.com/prebid/Prebid.js/issues/9781
-        auctionId: bidRequest.auctionId,
+        transactionid: bidRequest.ortb2Imp?.ext?.tid
       };
       if (bidRequest.params.zoneId) {
         slot.zoneid = bidRequest.params.zoneId;
@@ -509,11 +508,14 @@ function buildCdbRequest(context, bidRequests, bidderRequest) {
   if (networkId) {
     request.publisher.networkid = networkId;
   }
+
+  request.source = {
+    tid: bidderRequest.ortb2?.source?.tid
+  };
+
   if (schain) {
-    request.source = {
-      ext: {
-        schain: schain
-      }
+    request.source.ext = {
+      schain: schain
     };
   };
   request.user = bidderRequest.ortb2?.user || {};
@@ -754,7 +756,7 @@ function createOutstreamVideoRenderer(slot) {
     window.CriteoOutStream[slot.ext.videoPlayerType].play(payload, outstreamConfig)
   };
 
-  const renderer = Renderer.install({url: PUBLISHER_TAG_OUTSTREAM_SRC, config: config});
+  const renderer = Renderer.install({ url: PUBLISHER_TAG_OUTSTREAM_SRC, config: config });
   renderer.setRender(render);
   return renderer;
 }
diff --git a/test/spec/modules/criteoBidAdapter_spec.js b/test/spec/modules/criteoBidAdapter_spec.js
index 86ba2a4fba8..ff4e895ff2f 100755
--- a/test/spec/modules/criteoBidAdapter_spec.js
+++ b/test/spec/modules/criteoBidAdapter_spec.js
@@ -604,6 +604,56 @@ describe('The Criteo bidding adapter', function () {
       config.resetConfig();
     });
 
+    it('should properly build a request using random uuid as auction id', function () {
+      const generateUUIDStub = sinon.stub(utils, 'generateUUID');
+      generateUUIDStub.returns('def');
+      const bidderRequest = {
+      };
+      const bidRequests = [
+        {
+          bidder: 'criteo',
+          adUnitCode: 'bid-123',
+          transactionId: 'transaction-123',
+          mediaTypes: {
+            banner: {
+              sizes: [[728, 90]]
+            }
+          },
+          params: {}
+        },
+      ];
+      const request = spec.buildRequests(bidRequests, bidderRequest);
+      const ortbRequest = request.data;
+      expect(ortbRequest.id).to.equal('def');
+      generateUUIDStub.restore();
+    });
+
+    it('should properly transmit source.tid if available', function () {
+      const bidderRequest = {
+        ortb2: {
+          source: {
+            tid: 'abc'
+          }
+        }
+      };
+      const bidRequests = [
+        {
+          bidder: 'criteo',
+          adUnitCode: 'bid-123',
+          transactionId: 'transaction-123',
+          mediaTypes: {
+            banner: {
+              sizes: [[728, 90]]
+            }
+          },
+          params: {}
+        },
+      ];
+      const request = spec.buildRequests(bidRequests, bidderRequest);
+      const ortbRequest = request.data;
+      expect(ortbRequest.source.tid).to.equal('abc');
+    });
+
     it('should properly build a request if refererInfo is not provided', function () {
       const bidderRequest = {};
       const bidRequests = [
@@ -1083,7 +1133,7 @@ describe('The Criteo bidding adapter', function () {
     });
 
     it('should properly build a request with bcat field', function () {
-      const bcat = [ 'IAB1', 'IAB2' ];
+      const bcat = ['IAB1', 'IAB2'];
       const bidRequests = [
         {
           bidder: 'criteo',
@@ -1111,7 +1161,7 @@ describe('The Criteo bidding adapter', function () {
     });
 
     it('should properly build a request with badv field', function () {
-      const badv = [ 'ford.com' ];
+      const badv = ['ford.com'];
       const bidRequests = [
         {
           bidder: 'criteo',
@@ -1139,7 +1189,7 @@ describe('The Criteo bidding adapter', function () {
     });
 
     it('should properly build a request with bapp field', function () {
-      const bapp = [ 'com.foo.mygame' ];
+      const bapp = ['com.foo.mygame'];
       const bidRequests = [
         {
           bidder: 'criteo',