---
id: "CVE-2026-90821"
kind: "vulnerability"
aliases: ["CVE-2026-90821"]
title: "Crafty Controller: Webhook URL field lets authenticated users inject stored XSS"
severity: "medium"
cvss: 5.4
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["crafty-controller", "package", "self-hosted"]
not_affected_if: ["auth-required"]
published_at: "2026-10-16T14:19:10+00:00"
first_seen_at: "2026-10-23T21:57:13+00:00"
updated_at: "2026-10-25T04:18:32+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-90821", "first_seen_at": "2026-10-23T21:57:13+00:00"}]
---

# Crafty Controller: Webhook URL field lets authenticated users inject stored XSS

The Webhook URL form field in Crafty Controller does not neutralize user input, so a logged-in attacker can store malicious script in it. Other users who view the stored value can have that script run in their browser.

_Summary, check and fix written by a model from the sources; labelled as such._

## Timeline

- 2026-10-23T21:57:13+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-90821

## From the sources

An input neutralization vulnerability in the Webhook URL form field component of Crafty Controller allows a remote, authenticated attacker to perform stored XSS via malicious form input

---

_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_