PatchSiren cyber security CVE debrief

CVE-2026-54358 misp CVE debrief

CVE-2026-54358 is an incorrect authorization vulnerability in MISP that allows an organization administrator to target site administrator accounts belonging to the same organization through the administrative email functionality. The affected code restricted organization administrators to users within their own organization but did not exclude accounts assigned a site administrator role from recipient queries. This oversight enables an organization administrator to perform privileged account-management actions, such as initiating a password reset workflow, against a higher-privileged site administrator account within the same organization. Successful exploitation may allow an authenticated organization administrator to interfere with or potentially take over a site administrator account, resulting in privilege escalation and full compromise of the MISP instance’s confidentiality, integrity, and availability. The attacker must be authenticated as an organization administrator in the same organization as a site administrator account.