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CVE Watch15 sept 2026

CVE-2026-91857

Affected versions of MISP expose several state-changing controller actions without restricting them to POST. The affected actions are:

CVSS

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Sin CVSS

EPSS

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KEV

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Exploit Today

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0-100

Publicado: 15 sept 2026 · Última mod.: 15 sept 2026 · CWE-352

EPSS · 30d

Sin historial EPSS suficiente todavía.

Descripción técnica

Affected versions of MISP expose several state-changing controller actions without restricting them to POST. The affected actions are:  - EventReportsController::purgeUnusedPictures()  - NoticelistsController::enableNoticelist()  - ServersController::removeOrphanedCorrelations()  - WorkflowsController::rebuildRedis() The patch adds allowMethod(['post']) to each action, preventing them from being triggered through ordinary GET requests. For purgeUnusedPictures(), the corresponding UI previously used $.get(). The fix converts that request to POST and supplies X-CSRF-Token, while the controller enables header-only CSRF validation for that AJAX action. Because GET requests can be induced cross-origin through links, images, redirects, or navigation, accepting GET for these state-changing operations can let an attacker trigger them using the authenticated victim's session. Version affected: ≤2.5.45

Referencias oficiales
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