CVE-2026-39355: Genealogy is a family tree PHP application

Q: How do I fix CVE-2026-39355?

genealogy: upgrade to 5.9.1. Exact commands for each OS are on this page.

Q: Is CVE-2026-39355 being exploited?

CVE-2026-39355 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-39355 affect?

CVE-2026-39355 affects genealogy. Severity is critical (CVSS 9.9). 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

Q: How urgent is CVE-2026-39355?

Priority 46/100. Critical severity; Public exploit reference

This month

CRITICAL 9.9UPGRADE

CVE-2026-39355 is a critical-severity flaw (CVSS 9.9) affecting genealogy. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

Critical severity
Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	9.9 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.3% (top 76%)
CISA exploited list	No
Weakness	CWE-862
Published	2026-04-07
Last modified	2026-07-24

Publisher (CNA): GitHub, Inc. · Vendor: kreaweb

Last updated 2026-07-24 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-07 19:16 UTCPublished CVE record published
2026-07-24 21:10 UTCUpdated Record last modified

kreaweb genealogy UPGRADE

Affected: < 5.9.1

Fixed in: 5.9.1

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy genealogy || rpm -q genealogy || genealogy --version

2. UPGRADE to 5.9.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade genealogy

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade genealogy

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-39355?

genealogy: upgrade to 5.9.1. Exact commands for each OS are on this page.

Is CVE-2026-39355 being exploited?

CVE-2026-39355 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-39355 affect?

CVE-2026-39355 affects genealogy. Severity is critical (CVSS 9.9). 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

How urgent is CVE-2026-39355?

Priority 46/100. Critical severity; Public exploit reference

Software pages

PHP vulnerabilities

References

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