CVE-2026-39355 | Genealogy is a family tree PHP application. Prior to 5.9.1, … | CVSS 10.0 CRITICAL

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.

Metadata

CVE ID: CVE-2026-39355
State: PUBLISHED
Assigner: GitHub_M
Reserved: 2026-04-06 21:29 UTC
Published: 2026-04-07 18:56 UTC
Last updated: 2026-04-08 18:10 UTC
Primary CWE: CWE-862
CWE-862: Missing Authorization
Vendor / Product: MGeurts / genealogy
Sources: cve.org · NVD

Severity & Metrics

10.0 CRITICAL CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

SSVC — CISA Coordinator

Exploitation: PoC
Automatable: no
Tech. Impact: total

Affected products (1)

Vendor	Product	Platform	Versions
MGeurts	genealogy	—	< 5.9.1

Weakness (CWE)

CWE	Source	Description
CWE-862	cna	CWE-862: Missing Authorization

CVSS scores (1)

Score	Severity	Version	Source	Vector
10.0	CRITICAL	3.1	cna	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

References (1)

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