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

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)

[X_Refsource_Confirm] https://github.com/MGeurts/genealogy/security/advisories/GHSA-2rq7-jqm7-w8x4

Scores

CVSS v3 9.9

EPSS 0.0005

EPSS Percentile 14.0%

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