CVE-2026-39355

CRITICAL

Genealogy is Missing Authorization in `TeamController::transferOwnership()` Allows Any Authenticated User to Hijack Any Team (Broken Access Control)

Title source: cna
STIX 2.1

Description

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.

References (1)

Core 1
Core References

Scores

CVSS v3 9.9
EPSS 0.0032
EPSS Percentile 23.0%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact total

Details

CWE
CWE-862
Status published
Products (2)
kreaweb/genealogy < 5.9.1
MGeurts/genealogy < 5.9.1
Published Apr 07, 2026
Tracked Since Apr 08, 2026