---
id: CVE-2026-90443
title: >-
  A web interface reflects a portion of the request URL into a script context
  and a hyperlink attribute without adequate encoding, and does not require
  authentication to reach
summary: >-
  A web interface reflects a portion of the request URL into a script context
  and a hyperlink attribute without adequate encoding, and does not require
  authentication to reach. This allows an unauthenticated network attacker to
  craft a lin…
severity: medium
cvss: 5.4
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N'
cwe:
  - CWE-79
vendor: CISA
product: Malcolm
affected:
  - Malcolm < v26.06.0
published: '2026-09-11'
updated: '2026-10-02'
sourceUpdated: '2026-10-02T22:16:54.643'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-90443'
references:
  - url: >-
      https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/OT/white/2026/icsa-26-254-01.json
    label: ics-cert@hq.dhs.gov
  - url: 'https://www.cisa.gov/news-events/ics-advisories/icsa-26-254-01'
    label: ics-cert@hq.dhs.gov
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-14T12:49:46.823197Z'
epss: 0.00176
epssPercentile: 0.07104
scores:
  nvd: 5.4
  cna: 5.3
ingestedAt: '2026-09-14T15:23:07.429Z'
---

## Overview

A web interface reflects a portion of the request URL into a script context and a hyperlink attribute without adequate encoding, and does not require authentication to reach. This allows an unauthenticated network attacker to craft a link that, when visited by a user, executes arbitrary script in the context of the affected application and can redirect the user's browser to an arbitrary external site. Successful exploitation could allow an attacker to act with the compromised user's session privileges within the application.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.