diff --git a/modules/bitgo/test/v2/unit/pendingApproval.ts b/modules/bitgo/test/v2/unit/pendingApproval.ts
index 8a52608dc7..270b1851a0 100644
--- a/modules/bitgo/test/v2/unit/pendingApproval.ts
+++ b/modules/bitgo/test/v2/unit/pendingApproval.ts
@@ -174,6 +174,23 @@ describe('Pending Approvals:', () => {
     paScope.isDone().should.be.true();
   });
 
+  it('should cancel a pending approval without approving or rejecting it', async () => {
+    const pendingApproval = new PendingApproval(bitgo, basecoin, pendingApprovalData, wallet);
+    const paScope = nock(bgUrl)
+      .put(`/api/v2/${coin}/pendingapprovals/${pendingApprovalData.id}`, {
+        state: 'canceled',
+      })
+      .reply(200, {
+        ...pendingApprovalData,
+        state: State.CANCELED,
+      });
+
+    const response = await pendingApproval.cancel();
+
+    response.state.should.equal(State.CANCELED);
+    paScope.isDone().should.be.true();
+  });
+
   function testRecreateTransaction(coinName: string, recreateTransaction: boolean, type: Type) {
     it(`[${coinName}] should ${
       recreateTransaction ? 'not ' : ''
diff --git a/modules/express/src/clientRoutes.ts b/modules/express/src/clientRoutes.ts
index bdcad288ab..6697b88cc3 100755
--- a/modules/express/src/clientRoutes.ts
+++ b/modules/express/src/clientRoutes.ts
@@ -263,6 +263,9 @@ function handleApproveTransaction(req: ExpressApiRouteRequest<'express.v1.pendin
       if (params.state === 'approved') {
         return pendingApproval.approve(params);
       }
+      if (params.state === 'canceled') {
+        return pendingApproval.cancel(params);
+      }
       return pendingApproval.reject(params);
     });
 }
@@ -833,6 +836,9 @@ async function handleV2PendingApproval(req: ExpressApiRouteRequest<'express.pend
   if (params.state === 'approved') {
     return pendingApproval.approve(params);
   }
+  if (params.state === 'canceled') {
+    return pendingApproval.cancel(params);
+  }
   return pendingApproval.reject(params);
 }
 
diff --git a/modules/express/src/typedRoutes/api/v1/pendingApproval.ts b/modules/express/src/typedRoutes/api/v1/pendingApproval.ts
index edc26ad7fd..bc2ad8bde1 100644
--- a/modules/express/src/typedRoutes/api/v1/pendingApproval.ts
+++ b/modules/express/src/typedRoutes/api/v1/pendingApproval.ts
@@ -9,7 +9,7 @@ export const pendingApprovalRequestParams = {
 };
 
 export const pendingApprovalRequestBody = {
-  /** State of the approval: 'approved' to approve, any other value or omit to reject (defaults to rejection) */
+  /** State of the approval: 'approved' to approve, 'canceled' to cancel, any other value or omit to reject */
   state: optional(t.string),
   /** Wallet passphrase for transaction signing (required for transactionRequest approvals unless tx or xprv provided) */
   walletPassphrase: optional(t.string),
@@ -30,9 +30,9 @@ export const pendingApprovalRequestBody = {
 /**
  * Approve or reject a pending approval
  *
- * Updates the state of a pending approval to either 'approved' or 'rejected' based on the
- * state parameter. If state is 'approved', the approval is approved; otherwise, it is rejected.
- * Default behavior (when state is omitted) is rejection.
+ * Updates the state of a pending approval to 'approved', 'canceled', or 'rejected' based on
+ * the state parameter. If state is 'approved', the approval is approved; if state is 'canceled',
+ * it is canceled; otherwise, it is rejected. Default behavior is rejection.
  *
  * **Approval Types:**
  * - **transactionRequest**: Transaction approvals (may require walletPassphrase for signing)
diff --git a/modules/express/src/typedRoutes/api/v2/pendingApproval.ts b/modules/express/src/typedRoutes/api/v2/pendingApproval.ts
index e4325ccf0a..f786d1629a 100644
--- a/modules/express/src/typedRoutes/api/v2/pendingApproval.ts
+++ b/modules/express/src/typedRoutes/api/v2/pendingApproval.ts
@@ -17,7 +17,7 @@ export const PendingApprovalParams = {
  * Request body for approving or rejecting a pending approval
  */
 export const PendingApprovalRequestBody = {
-  /** New state for the pending approval: 'approved' to approve, omit or 'rejected' to reject */
+  /** New state: 'approved' to approve, 'canceled' to cancel, omit or 'rejected' to reject */
   state: optional(t.string),
   /** Passphrase to decrypt the user key on the wallet */
   walletPassphrase: optional(t.string),
@@ -48,6 +48,7 @@ export const PendingApprovalState = t.union([
   t.literal('approved'),
   t.literal('processing'),
   t.literal('rejected'),
+  t.literal('canceled'),
 ]);
 
 /**
diff --git a/modules/express/test/unit/typedRoutes/pendingApproval.ts b/modules/express/test/unit/typedRoutes/pendingApproval.ts
index b2b6585556..15e683ac5f 100644
--- a/modules/express/test/unit/typedRoutes/pendingApproval.ts
+++ b/modules/express/test/unit/typedRoutes/pendingApproval.ts
@@ -321,6 +321,13 @@ describe('PendingApproval codec tests', function () {
       enterprise: 'enterprise123',
     };
 
+    const mockCanceledResponse = {
+      id: 'approval123',
+      state: 'canceled',
+      wallet: 'wallet123',
+      enterprise: 'enterprise123',
+    };
+
     afterEach(function () {
       sinon.restore();
     });
@@ -387,6 +394,32 @@ describe('PendingApproval codec tests', function () {
       assert.strictEqual(result.body.enterprise, mockRejectedResponse.enterprise);
     });
 
+    it('should successfully cancel pending approval', async function () {
+      const approvalId = '123456789abcdef';
+      const requestBody = { state: 'canceled' };
+      const cancel = sinon.stub().resolves(mockCanceledResponse);
+
+      const mockPendingApprovalObject = {
+        approve: sinon.stub().resolves(mockApprovedResponse),
+        reject: sinon.stub().resolves(mockRejectedResponse),
+        cancel,
+      };
+
+      sinon.stub(BitGo.prototype, 'pendingApprovals').returns({
+        get: sinon.stub().resolves(mockPendingApprovalObject),
+      } as any);
+
+      const result = await agent
+        .put(`/api/v1/pendingapprovals/${approvalId}/express`)
+        .set('Authorization', 'Bearer test_access_token_12345')
+        .set('Content-Type', 'application/json')
+        .send(requestBody);
+
+      assert.strictEqual(result.status, 200);
+      assert.strictEqual(result.body.state, 'canceled');
+      sinon.assert.calledOnce(cancel);
+    });
+
     it('should successfully approve with otp', async function () {
       const approvalId = '123456789abcdef';
       const requestBody = {
diff --git a/modules/express/test/unit/typedRoutes/pendingApprovalV2.ts b/modules/express/test/unit/typedRoutes/pendingApprovalV2.ts
index 5ba1d38910..0084aa6225 100644
--- a/modules/express/test/unit/typedRoutes/pendingApprovalV2.ts
+++ b/modules/express/test/unit/typedRoutes/pendingApprovalV2.ts
@@ -321,6 +321,14 @@ describe('V2 PendingApproval API Tests', function () {
       wallet: 'wallet123',
     };
 
+    const mockCanceledResponse = {
+      id: 'approval123',
+      state: 'canceled',
+      creator: 'user123',
+      info: { type: 'transactionRequest' },
+      wallet: 'wallet123',
+    };
+
     afterEach(function () {
       sinon.restore();
     });
@@ -389,6 +397,36 @@ describe('V2 PendingApproval API Tests', function () {
         sinon.assert.calledOnce(mockPendingApprovalObject.reject);
       });
 
+      it('should successfully cancel pending approval', async function () {
+        const coin = 'tbtc';
+        const approvalId = '123456789abcdef';
+        const cancel = sinon.stub().resolves(mockCanceledResponse);
+
+        const mockPendingApprovalObject = {
+          approve: sinon.stub().resolves(mockApprovedResponse),
+          reject: sinon.stub().resolves(mockRejectedResponse),
+          cancel,
+        };
+
+        const mockCoin = {
+          pendingApprovals: sinon.stub().returns({
+            get: sinon.stub().resolves(mockPendingApprovalObject),
+          }),
+        };
+
+        sinon.stub(BitGo.prototype, 'coin').returns(mockCoin as any);
+
+        const result = await agent
+          .put(`/api/v2/${coin}/pendingapprovals/${approvalId}`)
+          .set('Authorization', 'Bearer test_access_token_12345')
+          .set('Content-Type', 'application/json')
+          .send({ state: 'canceled' });
+
+        assert.strictEqual(result.status, 200);
+        assert.strictEqual(result.body.state, 'canceled');
+        sinon.assert.calledOnce(cancel);
+      });
+
       it('should default to rejection with empty body', async function () {
         const coin = 'tbtc';
         const approvalId = '123456789abcdef';
diff --git a/modules/sdk-api/src/v1/pendingapproval.ts b/modules/sdk-api/src/v1/pendingapproval.ts
index daff3f1c66..49aa7777cf 100644
--- a/modules/sdk-api/src/v1/pendingapproval.ts
+++ b/modules/sdk-api/src/v1/pendingapproval.ts
@@ -359,10 +359,12 @@ PendingApproval.prototype.reject = function (params, callback) {
 
 //
 // cancel
-// rejects the pending approval
+// cancels the pending approval
 //
 PendingApproval.prototype.cancel = function (params, callback) {
-  return this.reject(params, callback);
+  return Promise.resolve(this.bitgo.put(this.url()).send({ state: 'canceled' }).result())
+    .then(callback)
+    .catch(callback);
 };
 
 export = PendingApproval;
diff --git a/modules/sdk-core/src/bitgo/pendingApproval/iPendingApproval.ts b/modules/sdk-core/src/bitgo/pendingApproval/iPendingApproval.ts
index a28396b052..24a83e8f73 100644
--- a/modules/sdk-core/src/bitgo/pendingApproval/iPendingApproval.ts
+++ b/modules/sdk-core/src/bitgo/pendingApproval/iPendingApproval.ts
@@ -16,6 +16,7 @@ export enum State {
   APPROVED = 'approved',
   PROCESSING = 'processing',
   REJECTED = 'rejected',
+  CANCELED = 'canceled',
 }
 
 export enum Type {
diff --git a/modules/sdk-core/src/bitgo/pendingApproval/pendingApproval.ts b/modules/sdk-core/src/bitgo/pendingApproval/pendingApproval.ts
index cb867e3c1e..ab7c2b3ea3 100644
--- a/modules/sdk-core/src/bitgo/pendingApproval/pendingApproval.ts
+++ b/modules/sdk-core/src/bitgo/pendingApproval/pendingApproval.ts
@@ -225,13 +225,11 @@ export class PendingApproval implements IPendingApproval {
   }
 
   /**
-   * Alias for PendingApproval.reject()
-   *
-   * @deprecated
+   * Sets this PendingApproval to a canceled state.
    * @param params
    */
   async cancel(params: Record<string, never> = {}): Promise<any> {
-    return await this.reject(params);
+    return await this.bitgo.put(this.url()).send({ state: 'canceled' }).result();
   }
 
   /**