CVE-2026-105456

    Dashboard / Vulnerabilities / CVE-2026-105456

    CVE-2026-105456

    Published: 30 Oct 2026Last Modified: 1 Nov 2026

    Summary: Stored XSS via HTML scrubber rule in RTIR

    Details: 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

    References: https://requesttracker.com/rtir/, https://cert.pl/en/posts/2026/10/CVE-2026-105454, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/105xxx/CVE-2026-105456.json, https://nvd.nist.gov/vuln/detail/CVE-2026-105456, https://github.com/bestpractical/rtir

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 301a72ca51a9435e013ada23dfb5f39bb51e7ce8
    Fixed -d1f640cb470b7168d56b092451992319b3821e27

    Affected versions

    5.0.10
    5.0.8
    5.0.0beta1

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    CVE-2026-105456 | CVE-DB