diff --git a/CHANGELOG.md b/CHANGELOG.md
index c13dfb3e..d5672b9d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,9 @@
 
 This file documents all notable changes made to ITFlow.
 
+## [26.05.1] Stable Release
+- Security Fixes.
+
 ## [26.05] Stable Release
 ### Bug Fixes
 - Stripe Payment: Fix adding saved cards on client portal.
diff --git a/agent/ajax.php b/agent/ajax.php
index b9f2ef0c..c5450e17 100644
--- a/agent/ajax.php
+++ b/agent/ajax.php
@@ -454,6 +454,12 @@ if (isset($_POST['update_kanban_ticket'])) {
 
     foreach ($positions as $position) {
         $ticket_id = intval($position['ticket_id']);
+
+        // Client perms check
+        $client_query = mysqli_fetch_assoc(mysqli_query($mysqli, "SELECT ticket_client_id FROM tickets WHERE ticket_id = $ticket_id"));
+        $client_id = intval($client_query['ticket_client_id']);
+        enforceClientAccess();
+
         $kanban = intval($position['ticket_order']); // ticket kanban position
         $status = intval($position['ticket_status']); // ticket statuses
         $oldStatus = intval($position['ticket_oldStatus']); // ticket old status if moved
diff --git a/agent/post/invoice.php b/agent/post/invoice.php
index 4efe9213..08353410 100644
--- a/agent/post/invoice.php
+++ b/agent/post/invoice.php
@@ -542,8 +542,8 @@ if (isset($_GET['email_invoice'])) {
     $invoice_number = intval($row['invoice_number']);
     $invoice_scope = sanitizeInput($row['invoice_scope']);
     $invoice_status = sanitizeInput($row['invoice_status']);
-    $invoice_date = sanitizeInput($row['invoice_date']);
-    $invoice_due = sanitizeInput($row['invoice_due']);
+    $invoice_date = sanitizeInput(validateDate($row['invoice_date']));
+    $invoice_due = sanitizeInput(validateDate($row['invoice_due']));
     $invoice_amount = floatval($row['invoice_amount']);
     $invoice_url_key = sanitizeInput($row['invoice_url_key']);
     $invoice_currency_code = sanitizeInput($row['invoice_currency_code']);
diff --git a/agent/post/recurring_invoice.php b/agent/post/recurring_invoice.php
index 5ff66e39..9aee5297 100644
--- a/agent/post/recurring_invoice.php
+++ b/agent/post/recurring_invoice.php
@@ -13,13 +13,13 @@ if (isset($_POST['add_invoice_recurring'])) {
     enforceUserPermission('module_sales', 2);
 
     $invoice_id = intval($_POST['invoice_id']);
-    $recurring_invoice_frequency = sanitizeInput($_POST['frequency']);
+    $recurring_invoice_frequency = ($_POST['frequency'] === 'year') ? 'year' : 'month';
 
     $sql = mysqli_query($mysqli,"SELECT * FROM invoices WHERE invoice_id = $invoice_id");
     $row = mysqli_fetch_assoc($sql);
     $invoice_prefix = sanitizeInput($row['invoice_prefix']);
     $invoice_number = intval($row['invoice_number']);
-    $invoice_date = sanitizeInput($row['invoice_date']);
+    $invoice_date = sanitizeInput(validateDate($row['invoice_date']));
     $invoice_amount = floatval($row['invoice_amount']);
     $invoice_currency_code = sanitizeInput($row['invoice_currency_code']);
     $invoice_scope = sanitizeInput($row['invoice_scope']);
@@ -394,7 +394,7 @@ if (isset($_GET['force_recurring'])) {
     $row = mysqli_fetch_assoc($sql_recurring_invoices);
     $recurring_invoice_id = intval($row['recurring_invoice_id']);
     $recurring_invoice_scope = sanitizeInput($row['recurring_invoice_scope']);
-    $recurring_invoice_frequency = sanitizeInput($row['recurring_invoice_frequency']);
+    $recurring_invoice_frequency = ($_POST['frequency'] === 'year') ? 'year' : 'month';
     $recurring_invoice_status = sanitizeInput($row['recurring_invoice_status']);
     $recurring_invoice_last_sent = sanitizeInput($row['recurring_invoice_last_sent']);
     $recurring_invoice_next_date = sanitizeInput($row['recurring_invoice_next_date']);
@@ -480,7 +480,7 @@ if (isset($_GET['force_recurring'])) {
         $invoice_prefix = sanitizeInput($row['invoice_prefix']);
         $invoice_number = intval($row['invoice_number']);
         $invoice_scope = sanitizeInput($row['invoice_scope']);
-        $invoice_date = sanitizeInput($row['invoice_date']);
+        $invoice_date = sanitizeInput(validateDate($row['invoice_date']));
         $invoice_due = sanitizeInput($row['invoice_due']);
         $invoice_amount = floatval($row['invoice_amount']);
         $invoice_url_key = sanitizeInput($row['invoice_url_key']);
diff --git a/client/post.php b/client/post.php
index ed1cdfb8..9d8e0f6d 100644
--- a/client/post.php
+++ b/client/post.php
@@ -524,12 +524,6 @@ if (isset($_GET['add_payment_by_provider'])) {
     $contact_extension = preg_replace("/[^0-9]/", '',$row['contact_extension']);
     $contact_mobile = sanitizeInput(formatPhoneNumber($row['contact_mobile'], $row['contact_mobile_country_code']));
 
-    // Check to make sure saved payment method belongs to logged in client
-    if ($client_id !== $session_client_id) {
-        flash_alert("Saved Payment method does not belong to you!", 'danger');
-        redirect();
-    }
-
     // Get ITFlow company details
     $sql = mysqli_query($mysqli,"SELECT * FROM companies WHERE company_id = 1");
     $row = mysqli_fetch_assoc($sql);
@@ -548,7 +542,7 @@ if (isset($_GET['add_payment_by_provider'])) {
     $config_invoice_from_email = sanitizeInput($config_invoice_from_email);
 
     // Get Client Payment Details
-    $sql = mysqli_query($mysqli, "SELECT * FROM client_saved_payment_methods LEFT JOIN payment_providers ON saved_payment_provider_id = payment_provider_id LEFT JOIN client_payment_provider ON saved_payment_client_id = client_id WHERE saved_payment_id = $saved_payment_id LIMIT 1");
+    $sql = mysqli_query($mysqli, "SELECT * FROM client_saved_payment_methods LEFT JOIN payment_providers ON saved_payment_provider_id = payment_provider_id LEFT JOIN client_payment_provider ON saved_payment_client_id = client_id WHERE saved_payment_id = $saved_payment_id AND saved_payment_client_id = $session_client_id LIMIT 1");
     $row = mysqli_fetch_assoc($sql);
 
     $public_key = sanitizeInput($row['payment_provider_public_key']);
@@ -561,9 +555,17 @@ if (isset($_GET['add_payment_by_provider'])) {
     $payment_provider_client = sanitizeInput($row['payment_provider_client']);
     $saved_payment_method = sanitizeInput($row['saved_payment_provider_method']);
     $saved_payment_description = sanitizeInput($row['saved_payment_description']);
+    $payment_client_id = intval($row['saved_payment_client_id']);
 
     // Sanity checks
-    if (!$payment_provider_client || !$saved_payment_method) {
+    // Check to make invoice belongs to logged in client
+    if ($client_id !== $session_client_id) {
+        flash_alert("Invoice does not belong to you!", 'danger');
+        redirect();
+    } elseif ($payment_client_id !== $session_client_id) {
+        flash_alert("Saved Payment method does not belong to you!", 'danger');
+        redirect();
+    } elseif (!$payment_provider_client || !$saved_payment_method) {
         flash_alert("Stripe not enabled or no client card saved", 'error');
         redirect();
     } elseif ($invoice_status !== 'Sent' && $invoice_status !== 'Viewed') {
diff --git a/functions.php b/functions.php
index ae38369d..c93a79af 100644
--- a/functions.php
+++ b/functions.php
@@ -1512,8 +1512,8 @@ function logAction($type, $action, $description, $client_id = 0, $entity_id = 0)
 function logApp($category, $type, $details) {
     global $mysqli;
 
-    $category = substr($category, 0, 200);
-    $details = substr($details, 0, 1000);
+    $category = mysqli_real_escape_string($mysqli, substr($category, 0, 200));
+    $details = mysqli_real_escape_string($mysqli, substr($details, 0, 1000));
 
     mysqli_query($mysqli, "INSERT INTO app_logs SET app_log_category = '$category', app_log_type = '$type', app_log_details = '$details'");
 }
@@ -2073,3 +2073,10 @@ function formatDuration($time) {
 
     return implode(' ', $parts);
 }
+
+function validateDate($date) {
+    if (preg_match('/^\d{4}-\d{2}-\d{2}$/', $date)) {
+        return $date;
+    }
+    return date('Y-m-d'); // Fallback
+}
diff --git a/includes/app_version.php b/includes/app_version.php
index a89f2f73..dc06d457 100644
--- a/includes/app_version.php
+++ b/includes/app_version.php
@@ -5,4 +5,4 @@
  * Update this file each time we merge develop into master. Format is YY.MM (add a .v if there is more than one release a month.
  */
 
-DEFINE("APP_VERSION", "26.05");
+DEFINE("APP_VERSION", "26.05.1");