diff --git a/changelog/18951.txt b/changelog/18951.txt
new file mode 100644
index 000000000..9617c0d49
--- /dev/null
+++ b/changelog/18951.txt
@@ -0,0 +1,3 @@
+```release-note:bug
+core: Prevent panics in `sys/leases/lookup`, `sys/leases/revoke`, and `sys/leases/renew` endpoints if provided `lease_id` is null
+```
diff --git a/vault/request_handling.go b/vault/request_handling.go
index c31d543eb..1d56d488a 100644
--- a/vault/request_handling.go
+++ b/vault/request_handling.go
@@ -632,7 +632,7 @@ func (c *Core) handleCancelableRequest(ctx context.Context, req *logical.Request
 		case "sys/leases/lookup", "sys/leases/renew", "sys/leases/revoke", "sys/leases/revoke-force":
 			leaseID, ok := req.Data["lease_id"]
 			// If lease ID is not present, break out and let the backend handle the error
-			if !ok {
+			if !ok || leaseID == nil {
 				break
 			}
 			_, nsID := namespace.SplitIDFromString(leaseID.(string))