diff --git a/src/libs/ReportUtils.ts b/src/libs/ReportUtils.ts
index bb9237ffd843..826429fce986 100644
--- a/src/libs/ReportUtils.ts
+++ b/src/libs/ReportUtils.ts
@@ -5127,13 +5127,21 @@ function canEditMoneyRequest(
     }
     // This will be fixed as part of https://github.com/Expensify/Expensify/issues/507850
     const reportPolicy = policy ?? getPolicy(moneyRequestReport?.policyID);
-    const isAdmin = reportPolicy?.role === CONST.POLICY.ROLE.ADMIN;
-    const isManager = deprecatedCurrentUserAccountID === moneyRequestReport?.managerID;
+    const isManagerOfReport = deprecatedCurrentUserAccountID === moneyRequestReport?.managerID;
 
-    if (isInvoiceReport(moneyRequestReport) && (isManager || isChatReportArchived)) {
+    if (isInvoiceReport(moneyRequestReport) && (isManagerOfReport || isChatReportArchived)) {
         return false;
     }
 
+    // Admin/manager rights only apply when the expense actually sits on a workspace report. Without this guard an
+    // unreported expense (self-DM track expense) is weighed against the caller's policy, which is the viewer's own
+    // default workspace rather than the expense's, so anyone who admins any workspace could edit someone else's
+    // expense. A self-DM also has no managerID, so an unresolved account ID would otherwise match it. Invoice reports
+    // stay included so a policy admin keeps the rights they had before this guard existed.
+    const isReportOnAWorkspace = isFinancialReportsForBusinesses(moneyRequestReport);
+    const isAdmin = isReportOnAWorkspace && reportPolicy?.role === CONST.POLICY.ROLE.ADMIN;
+    const isManager = isReportOnAWorkspace && isManagerOfReport;
+
     // Admin & managers can always edit coding fields such as tag, category, billable, etc.
     if (isAdmin || isManager) {
         return true;
diff --git a/tests/unit/ReportUtilsTest.ts b/tests/unit/ReportUtilsTest.ts
index 31f041489644..c1695e403a96 100644
--- a/tests/unit/ReportUtilsTest.ts
+++ b/tests/unit/ReportUtilsTest.ts
@@ -6165,6 +6165,116 @@ describe('ReportUtils', () => {
             expect(canEditRequest).toEqual(false);
         });
 
+        it('should not let someone else edit an unreported expense just because they are an admin of their own workspace', async () => {
+            const otherUserAccountID = 99;
+            const selfDMReport: Report = {
+                reportID: '98099',
+                type: CONST.REPORT.TYPE.CHAT,
+                chatType: CONST.REPORT.CHAT_TYPE.SELF_DM,
+                ownerAccountID: otherUserAccountID,
+                stateNum: CONST.REPORT.STATE_NUM.OPEN,
+                statusNum: CONST.REPORT.STATUS_NUM.OPEN,
+            };
+            // The workspace the viewer would move the expense to, which is their own - not the workspace the expense belongs to
+            const viewerOwnPolicy: Policy = {
+                ...createRandomPolicy(98099, CONST.POLICY.TYPE.TEAM),
+                role: CONST.POLICY.ROLE.ADMIN,
+            };
+            const transaction = {
+                ...createRandomTransaction(98099),
+                reportID: CONST.REPORT.UNREPORTED_REPORT_ID,
+                // A managed card transaction is allowed through earlier on, so keep this a plain tracked expense
+                managedCard: false,
+            };
+            const trackExpenseAction: ReportAction<typeof CONST.REPORT.ACTIONS.TYPE.IOU> = {
+                ...createRandomReportAction(98099),
+                reportID: selfDMReport.reportID,
+                actionName: CONST.REPORT.ACTIONS.TYPE.IOU,
+                actorAccountID: otherUserAccountID,
+                message: [{type: CONST.REPORT.MESSAGE.TYPE.TEXT, text: ''}],
+                previousMessage: undefined,
+                originalMessage: {
+                    IOUTransactionID: transaction.transactionID,
+                    amount: 530,
+                    currency: CONST.CURRENCY.USD,
+                    type: CONST.IOU.REPORT_ACTION_TYPE.TRACK,
+                },
+            };
+
+            const reportCollectionDataSet: ReportCollectionDataSet = {
+                [`${ONYXKEYS.COLLECTION.REPORT}${selfDMReport.reportID}`]: selfDMReport,
+            };
+            const transactionCollectionDataSet: TransactionCollectionDataSet = {
+                [`${ONYXKEYS.COLLECTION.TRANSACTION}${transaction.transactionID}`]: transaction,
+            };
+
+            await Onyx.multiSet({
+                [ONYXKEYS.PERSONAL_DETAILS_LIST]: participantsPersonalDetails,
+                [ONYXKEYS.SESSION]: {email: currentUserEmail, accountID: currentUserAccountID},
+                ...reportCollectionDataSet,
+                ...transactionCollectionDataSet,
+            });
+            await waitForBatchedUpdates();
+
+            expect(canEditMoneyRequest(trackExpenseAction, transaction, undefined, false, selfDMReport, viewerOwnPolicy)).toBe(false);
+
+            // The person who tracked the expense keeps their own edit rights
+            expect(canEditMoneyRequest({...trackExpenseAction, actorAccountID: currentUserAccountID}, transaction, undefined, false, selfDMReport, viewerOwnPolicy)).toBe(true);
+        });
+
+        it('should still let a policy admin edit an expense on an unapproved invoice report', async () => {
+            // Invoice reports are workspace reports, so restricting admin rights to reported expenses must not strip
+            // them here. Dynamic External Workflow is set deliberately because only the admin check short-circuits
+            // ahead of the guard that blocks non-admins on reports that are no longer open.
+            const invoicePolicy: Policy = {
+                ...createRandomPolicy(98100, CONST.POLICY.TYPE.TEAM),
+                role: CONST.POLICY.ROLE.ADMIN,
+                approvalMode: CONST.POLICY.APPROVAL_MODE.DYNAMICEXTERNAL,
+            };
+            const invoiceReport: Report = {
+                reportID: '98100',
+                type: CONST.REPORT.TYPE.INVOICE,
+                policyID: invoicePolicy.id,
+                ownerAccountID: 99,
+                // A different account, so the invoice-manager early return below does not apply
+                managerID: 8723,
+                stateNum: CONST.REPORT.STATE_NUM.SUBMITTED,
+                statusNum: CONST.REPORT.STATUS_NUM.SUBMITTED,
+            };
+            const transaction = {...createRandomTransaction(98100), reportID: invoiceReport.reportID};
+            const invoiceAction: ReportAction<typeof CONST.REPORT.ACTIONS.TYPE.IOU> = {
+                ...createRandomReportAction(98100),
+                reportID: invoiceReport.reportID,
+                actionName: CONST.REPORT.ACTIONS.TYPE.IOU,
+                actorAccountID: 99,
+                message: [{type: CONST.REPORT.MESSAGE.TYPE.TEXT, text: ''}],
+                previousMessage: undefined,
+                originalMessage: {
+                    IOUTransactionID: transaction.transactionID,
+                    amount: 530,
+                    currency: CONST.CURRENCY.USD,
+                    type: CONST.IOU.REPORT_ACTION_TYPE.CREATE,
+                },
+            };
+
+            const reportCollectionDataSet: ReportCollectionDataSet = {
+                [`${ONYXKEYS.COLLECTION.REPORT}${invoiceReport.reportID}`]: invoiceReport,
+            };
+            const transactionCollectionDataSet: TransactionCollectionDataSet = {
+                [`${ONYXKEYS.COLLECTION.TRANSACTION}${transaction.transactionID}`]: transaction,
+            };
+
+            await Onyx.multiSet({
+                [ONYXKEYS.PERSONAL_DETAILS_LIST]: participantsPersonalDetails,
+                [ONYXKEYS.SESSION]: {email: currentUserEmail, accountID: currentUserAccountID},
+                ...reportCollectionDataSet,
+                ...transactionCollectionDataSet,
+            });
+            await waitForBatchedUpdates();
+
+            expect(canEditMoneyRequest(invoiceAction, transaction, undefined, false, invoiceReport, invoicePolicy)).toBe(true);
+        });
+
         it('should use the passed reportActions to determine whether the report was forwarded since the last submit', async () => {
             const reportID = '89015';
             const transactionID = '89015-transaction';