23 Oct 2026 15:48:27 UTC
MISP: State-changing actions accessible via GET request enabling CSRF
cve-program · CVE-2026-91857 · Published
CVE-2026-91857
MISP: State-changing actions accessible via GET request enabling CSRF
CVSS 4.0 5.3 MEDIUMCheck source for fixed versionsKEV status unknown
cve-program · CVE-2026-91857
PublishedAffected 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
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