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[ CVE-2026-104906 · Published 2 Oct 2026 ]

Vulnerability in MISP

CVSS 6.2 EPSS <1%1 agency advisoryNo fix listed yet

[ Description ]Official description

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.

[ Fixes ]Fixes and patches

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ Advisories ]Government CERT advisories

  • BSI CERT-BundWID-SEC-2026-3729

    MISP: Multiple vulnerabilities Translated from German

    CVE-2026-104908CVE-2026-104914CVE-2026-104910+5 more CVEs

[ References ]References