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CVE-2026-105456: RTIR extends RT's HTML scrubber to allow an internal link placeholder, and the extension lets through any link that merely contains the placeholder,

CVE-2026-105456 Oct 30, 2026 Source: Vendor

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 Incid

Source of record The credited names below are quoted verbatim from the vendor's own advisory: https://nvd.nist.gov/vuln/detail/CVE-2026-105456

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Credited

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CVE-2026-105456 BR2026-0000-039856 unclaimed

Credited as Mateusz Szymaniec (CERT.PL)