Skip to main content
CVE-2026-105456VulnerabilityPublished

RTIR extends RT's HTML scrubber to allow an internal link placeholder, and the extension lets through any link that

Source GCVE Database

0
Compare
Authoritative record:CVE-2026-105456· Medium 5.3

Not known to be exploited · CVSS 5.3 Medium : upgrade to 6.0.4 or 5.0.11 when convenient.

Data as of 30 Oct 2026, 20:21 UTC

CVSS 4.0 base score
5.3Medium
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CNA (CERT-PL)CVSS 4.05.3
Patch
Available – fixed in 6.0.4, 5.0.11
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

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 30 Oct 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.

What to do

Upgrade RT for Incident Response to 6.0.4 or 5.0.11.

Affected software

ProductAffectedFixed in
Best Practical SolutionsRT for Incident ResponseAffected
  • >=6.0.0 <6.0.4
Fixed in
  • 6.0.4
Best Practical SolutionsRT for Incident ResponseAffected
  • >=5.0.0 <5.0.11
Fixed in
  • 5.0.11
GitHubRT for Incident Responsepkg:github/RT for Incident ResponseOther threatsAffected
  • >=5.0.0 <5.0.11
  • >=6.0.0 <6.0.4
Fixed in
  • 5.0.11
  • 6.0.4

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Upgrade RT to version 5.0.11 or later, or 6.0.4 or later, where this vulnerability has been fixed. Applying these official fixes will prevent the HTML scrubber extension from allowing unsafe links containing the internal link placeholder. Until patched, restrict the ability to add HTML content to tickets and consider limiting access to the Incident Reports queue to trusted users only.

Description

RTIR extends RT's HTML scrubber to allow an internal link placeholder, which inadvertently permits any link containing this placeholder, including javascript: scheme links. This affects the entire RT instance once RTIR is installed, allowing anyone who can add HTML content to a ticket, including unauthenticated senders to the Incident Reports queue, to embed such links. When a user clicks these links, scripts run with that user's privileges within RT. The issue was fixed in RT versions 5.0.11 and 6.0.4.

References

Community reviews

Loading reviews…