- HTMX has near-zero critical CVEs, per NVD/NIST data from June 2026, because it is a small client-side library of about 14KB that does not run on the server or handle logins, uploads or databases.
- WebPulse's June 2026 figures show WordPress with 18,005 CVEs, Django 294 and Laravel 216, since full-stack frameworks add features and each feature adds attack surface.
- Security-conscious organizations can pair HTMX with a server-side framework so business logic, validation and authorization stay on the server, rather than moving them into the browser as single-page frameworks do.
HTMX has accumulated near-zero critical CVEs. Not because it is new — the library has been in active development since 2020. Not because nobody uses it — GitHub stars have grown steadily and adoption spans from solo developers to enterprise teams. The CVE count is near-zero because HTMX does not do the things that generate CVEs.
What HTMX Does Not Do
HTMX does not run on the server. It does not manage authentication. It does not process file uploads. It does not handle sessions, parse email, render templates, or interact with databases. It is an HTML attribute library — approximately 14KB of JavaScript that extends what hypermedia can express. When a user clicks a button with an hx-get attribute, HTMX makes an HTTP request and swaps the returned HTML into the page. That is the entire operational surface.
The Comparison Spectrum
WordPress has accumulated 18,005 CVEs. Laravel has 216. Django has 294. These are full-stack frameworks that handle routing, authentication, file management, database operations, email, and in WordPress's case, an entire plugin ecosystem with its own dependency chains. Each capability adds surface area. Each surface area generates vulnerability potential.
HTMX occupies a fundamentally different category. It does not compete with these frameworks — it replaces the JavaScript-heavy frontend layer that sits on top of them. An organization running Django with HTMX on the frontend has a server-side framework handling security-critical operations and a thin client-side library handling DOM updates. The attack surface is concentrated where the security expertise already lives: on the server.
Less Surface, Less Exposure
The security implication extends beyond CVE counts. Single-page application frameworks like React and Angular move substantial logic to the browser — state management, routing, API orchestration, sometimes authentication flows. Each piece of client-side logic is logic that executes in an environment the organization does not control. The browser is the attacker's workbench.
HTMX inverts this pattern. The server renders HTML. The client displays it. Business logic never leaves the server. Validation never leaves the server. Authorization never leaves the server. The client's role is presentation, and presentation alone does not generate the vulnerability classes that fill CVE databases.
For security-conscious organizations, HTMX represents an architectural choice that reduces exposure by reducing capability at the edge. The less the frontend does, the less there is to exploit. That constraint is not a limitation — it is the security model.
