CVE-2026-39355 | THREATINT

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.

PUBLISHED Reserved 2026-04-06 | Published 2026-04-07 | Updated 2026-04-08 | Assigner GitHub_M

CRITICAL: 10.0CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Problem types

CWE-862: Missing Authorization

Product status

< 5.9.1

affected

References

github.com/...ealogy/security/advisories/GHSA-2rq7-jqm7-w8x4 exploit

github.com/...ealogy/security/advisories/GHSA-2rq7-jqm7-w8x4

cve.org (CVE-2026-39355)

nvd.nist.gov (CVE-2026-39355)

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