CVE-2026-39355: Kreaweb Genealogy

High severity, CVSS 8.8. EPSS: 0.4% chance of exploitation in the next 30 days.

Genealogy is a family tree PHP application. Prior to 5.9.1, a critical broken access control vulnerability in the genealogy application allows any authenticated user to transfer ownership of arbitrary non-personal teams to themselves. This enables complete takeover of other users’ team workspaces and unrestricted access to all genealogy data associated with the compromised team. This vulnerability is fixed in 5.9.1.

Affected products

• Kreaweb Genealogy: before 5.9.1 (fixed in 5.9.1)

Published 2026-04-07. Last modified 2026-07-24.