---
id: CVE-2026-104906
title: >-
  MISP contains a cross-site scripting (XSS) vulnerability in the TAXII object
  viewer
summary: >-
  MISP contains a cross-site scripting (XSS) vulnerability in the TAXII object
  viewer. When displaying a remote TAXII object, the JSON content of string
  properties was rendered directly into an HTML pre block without HTML-encoding.
  An atta…
severity: medium
cvss: 6.2
cvssVector: 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N'
cwe:
  - CWE-79
vendor: MISP
product: MISP
affected:
  - MISP < 2.5.48
published: '2026-10-02'
updated: '2026-10-02'
sourceUpdated: '2026-10-02T17:17:04.633'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-104906'
references:
  - url: 'https://github.com/MISP/MISP/commit/1bed4ca0c'
    label: 5a6e4751-2f3f-4070-9419-94fb35b644e8
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-02T16:17:09.468515Z'
cvssSource: cna
ingestedAt: '2026-10-02T16:22:59.529Z'
---

## Overview

MISP contains a cross-site scripting (XSS) vulnerability in the TAXII object viewer. When displaying a remote TAXII object, the JSON content of string properties was rendered directly into an HTML pre block without HTML-encoding. An attacker who can control or influence the content of a TAXII object (e.g., by publishing a malicious object to a TAXII server that the victim's MISP instance subscribes to) can inject arbitrary HTML or JavaScript that executes in the context of the victim's MISP session.

Preconditions:

- The victim must be an authenticated MISP user with access to the TAXII object viewer.

- The victim must open or view the crafted TAXII object.

Impact:

- Execution of arbitrary JavaScript in the victim's browser within the MISP application context.

- Potential theft of session tokens, API keys, or other sensitive data accessible from the MISP interface.

- Potential for performing actions on behalf of the authenticated user.

Affected versions: <2.5.48.

## Remediation

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