CVE-2026-30048 NotChatbot WebChat has a stored cross-site scripting (XSS) vulnerability
Attackers can inject arbitrary JavaScript into chat history via unsanitized input, leading to code execution when history is reloaded.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-30048?
CVE-2026-30048 is a medium-severity cross-site scripting vulnerability in n/a, published on 18 Mar 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
A stored cross-site scripting (XSS) vulnerability exists in the NotChatbot WebChat widget thru 1.4.4. User-supplied input is not properly sanitized before being stored and rendered in the chat conversation history. This allows an attacker to inject arbitrary JavaScript code which is executed when the chat history is reloaded. The issue is reproducible across multiple independent implementations of the widget, indicating that the vulnerability resides in the product itself rather than in a specific website configuration.
Weakness: CWE-79
Which versions are affected by CVE-2026-30048?
2 open source packages ship an affected version, including @developer.notchatbot/webchat.
| Package | Affected | Fixed in |
|---|---|---|
@developer.notchatbot/webchat npm | All versions to 1.5.0 | None |
@developer.notchatbot/webchat npm | All versions to 1.5.0 | None |
How do I fix CVE-2026-30048?
No fix has been published for CVE-2026-30048 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-30048 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-30048 exists.
Public exploit code: 1 proofs of concept on GitHub.
Sources
Also known as GHSA-w3vx-52j6-9fjp.