---
id: CVE-2026-105456
title: Stored XSS via HTML scrubber rule in RTIR
summary: |-
  RTIR extends RT's HTML scrubber to allow an internal link
        placeholder, and the extension lets through any link that merely
        contains the placeholder, including links using the executable
        javascript: scheme. The change ap…
severity: medium
cvss: 5.3
cvssVector: 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N'
cvssSource: cna
cwe:
  - CWE-79
vendor: Best Practical Solutions
product: RT for Incident Response
affected:
  - rt_for_incident_response >= 5.0.0 < 5.0.11
  - rt_for_incident_response >= 6.0.0 < 6.0.4
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-30T17:05:31.942517Z'
published: '2026-10-30'
updated: '2026-10-30'
sourceUpdated: '2026-10-30T17:18:22.375Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-105456'
references:
  - url: 'https://cert.pl/en/posts/2026/10/CVE-2026-105454'
  - url: 'https://requesttracker.com/rtir/'
tags:
  - cve.org
epss: 0.0045
epssPercentile: 0.3928
ingestedAt: '2026-11-05T16:24:31.165Z'
---

## Overview

RTIR extends RT's HTML scrubber to allow an internal link
      placeholder, and the extension lets through any link that merely
      contains the placeholder, including links using the executable
      javascript: scheme. The change applies to the whole RT instance
      once RTIR is installed, not only to RTIR's own queues. Anyone who
      can add HTML content to a ticket on such an instance can store
      such a link. That includes an unauthenticated sender of HTML email
      to the Incident Reports queue, which RTIR opens to everyone by
      default. Script runs when a user clicks the link, in that user's
      session, and can act in RT with that user's authority.


This issue was fixed in version 5.0.11 and 6.0.4

## Affected

- `rt_for_incident_response >= 5.0.0 < 5.0.11`
- `rt_for_incident_response >= 6.0.0 < 6.0.4`

## Remediation

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