CVE-2026-91857

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

CVSS

No CVSS.

References

Link	Resource
https://github.com/MISP/MISP/commit/b4a5486b5

Configurations

No configuration.

History

No history.

Information

Published : 2026-09-15 10:17

Updated : 2026-09-15 14:17

NVD link : CVE-2026-91857

Mitre link : CVE-2026-91857

CVE.ORG link : CVE-2026-91857

JSON object : View

Products Affected

No product.

CWE

CWE-352

Cross-Site Request Forgery (CSRF)

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