react-hot-toast is a small, actively maintained React notification library with no known published vulnerabilities, and the real security consideration is not the package itself but how you render user-controlled data inside a toast. If you are adding npm react-hot-toast to a project and want to know whether it is a liability, the short answer is that the library is a reasonable dependency. The longer answer, which is the useful one, is about the usage patterns that turn a harmless notification component into a cross-site scripting vector.
What react-hot-toast Is
react-hot-toast, published by developer Timo Lins (timolins on GitHub), renders the small transient notification popups you see after an action succeeds or fails. It is popular for good reasons: it is lightweight, has a clean API, supports promise-based toasts that update from loading to success automatically, and ships with sensible accessibility defaults. The latest release, 2.6.0, went out on 15 August 2025, and its release cadence has stayed steady.
You install it the usual way:
npm install react-hot-toast
Then it is a hook and a component:
import toast, { Toaster } from 'react-hot-toast';
function App() {
return (
<>
<button onClick={() => toast.success('Saved')}>Save</button>
<Toaster />
</>
);
}
Maintenance and Supply Chain Health
For an open source dependency, maintenance status is a security property, not a nice-to-have. An abandoned package is one that will not get a patch when a vulnerability lands, and an abandoned package with publish rights held by a single account is a takeover target.
react-hot-toast rates well here. It is under active maintenance with a healthy release cadence, and package-health scanners class it as sustainable. It has a single primary maintainer, which is normal for a library this size but worth noting: a project with one maintainer depends on that person's account security. When you audit npm react hot toast as a dependency, the maintainer count and the recency of the last release are the two signals that matter most, and both look fine.
Its dependency footprint is small, which is what you want. Fewer transitive dependencies means fewer packages that can independently go bad. A tiny library that pulls in forty transitive packages can carry more aggregate risk than its own code ever would; that is not the case here.
The Actual Risk: Rendering Untrusted Content
Here is where teams get into trouble. react-hot-toast lets you render arbitrary JSX inside a toast, including custom components. That flexibility is the whole appeal, and it is also the hole.
The danger appears when the content of a toast comes from user input or an external API. Consider a pattern like showing a server error message directly:
// Risky if `message` is attacker-influenced and rendered as HTML
toast.error(serverResponse.message);
Passing a plain string to toast.error is safe, because React escapes string children by default. The problem is when developers reach for dangerouslySetInnerHTML to render "rich" toast content, or build a custom toast component that injects an unsanitized string as markup. At that point you have handed cross-site scripting a delivery channel. An attacker who controls part of an API response, a username, or a query parameter that ends up in a toast can execute script in the victim's browser.
The fix is the same discipline that applies everywhere in React:
Render untrusted data as text, never as HTML. Let React's default escaping do its job.
If you genuinely need rich content, sanitize with a library like DOMPurify before it reaches any HTML-rendering path, and treat dangerouslySetInnerHTML as a code smell that requires review.
Do not put secrets or full stack traces into toasts. They are visible in the DOM and often logged. A generic "Something went wrong" to the user and the detail to your server logs is the right split.
This is not a react-hot-toast flaw. The library is doing what you told it to. It is a class of bug that lives in how notification content is assembled, and it is worth a note in your code review checklist wherever toasts render dynamic data. The Safeguard Academy has a broader walk-through of XSS sinks in React applications.
Should You Use It
Yes, with the usual caveats that apply to any dependency. It is small, maintained, and free of known CVEs at the time of writing. Pin the version in your lockfile, let your dependency scanner watch it for future advisories, and put the usage discipline above into your review standards. An SCA tool will alert you if a future version or one of its dependencies picks up a vulnerability, which is the part of dependency safety that outlives any single review.
The broader point: "is this npm package safe" is rarely answered by the package alone. It is answered by the package's health plus how you use it plus whether you will hear about it when something changes. react-hot-toast scores well on the first, is entirely on you for the second, and the third is what continuous scanning buys you.
FAQ
Does react-hot-toast have any known vulnerabilities?
At the time of writing, react-hot-toast has no known published CVEs and is classified as sustainably maintained. That can change, so pin the version and let a dependency scanner watch it rather than assuming a clean record is permanent.
Can react-hot-toast cause XSS?
Not on its own. If you pass strings to its toast functions, React escapes them safely. XSS risk appears only when you render untrusted content as raw HTML inside a custom toast, typically via dangerouslySetInnerHTML. Render dynamic data as text or sanitize it first.
Is react-hot-toast still maintained?
Yes. Its most recent release, 2.6.0, shipped in August 2025, and it has a steady release history. It has a single primary maintainer, so its supply chain safety partly depends on that account staying secure, which is normal for a library of its size.
How should I handle server error messages in toasts?
Show the user a generic message and keep the detailed error in your server logs. Never render an untrusted server string as HTML, and never put secrets or full stack traces into a toast, since toast content lives in the DOM where it is easy to inspect.