Last updated: January 12, 2026
An honest security analysis of Bolt.new for developers considering it for their projects.
Bolt.new is a legitimate tool by StackBlitz that runs code in browser-based WebContainers - your code never touches their servers during development. Unlike Lovable (Supabase-only), Bolt.new supports multiple backends including Supabase, Firebase, and others, so security configuration depends on which backend you choose.
Bolt.new's WebContainer architecture is innovative and secure - your code stays local during development. The lack of major security incidents (unlike Lovable's CVE-2025-48757) suggests good practices. However, the multi-backend flexibility means YOU must configure security for whichever database you're using. Scan before launch.
Understanding Bolt.new security in the context of broader industry trends and research.
of Lovable applications (170 out of 1,645) had exposed user data in the CVE-2025-48757 incident
Source: CVE-2025-48757 security advisory
average cost of a data breach in 2023
Source: IBM Cost of a Data Breach Report 2023
developers using vibe coding platforms like Lovable, Bolt, and Replit
Source: Combined platform statistics 2024-2025
“There's a new kind of coding I call 'vibe coding', where you fully give in to the vibes, embrace exponentials, and forget that the code even exists.”
“It's not really coding - I just see stuff, say stuff, run stuff, and copy paste stuff, and it mostly works.”
Bolt.new is a legitimate product built by StackBlitz, an established company that created web-based VS Code. Their WebContainer technology runs Node.js entirely in your browser - your code doesn't touch their servers during development, which is actually more secure than traditional cloud IDEs.
Bolt.new is safe for development and can produce production-ready apps, but you must configure security for your chosen backend. If using Supabase, enable RLS. If using Firebase, write proper Security Rules. Bolt.new has no major security incidents like CVE-2025-48757 that affected Lovable apps.
Unlike Lovable (Supabase-only), Bolt.new supports multiple backends including Supabase, Firebase, custom Node.js backends, and more. This flexibility means you need to understand the security model of whichever backend you choose: RLS for Supabase, Security Rules for Firebase.
WebContainers run Node.js entirely in your browser using WebAssembly. Your code doesn't leave your machine during development, which is inherently more private than cloud-based IDEs. This technology has been in production since 2021 with no major security incidents.
Bolt.new uses WebContainers (local execution) while Lovable uses cloud-based generation. Bolt.new supports multiple backends; Lovable only uses Supabase. Lovable was affected by CVE-2025-48757 (170+ apps exposed); Bolt.new has had no equivalent incident. Both require database security configuration.
Don't guess - scan your app and know for certain. VAS checks for all the common security issues in Bolt.new applications.