CVE-2026-40196: HomeBox is a home inventory and organization system

Q: How do I fix CVE-2026-40196?

homebox: upgrade to 0.25.0. Exact commands for each OS are on this page.

Q: Is CVE-2026-40196 being exploited?

CVE-2026-40196 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-2026-40196 affect?

CVE-2026-40196 affects homebox. Severity is high (CVSS 8.1). HomeBox is a home inventory and organization system. Versions prior to 0.25.0 contain a vulnerability where the defaultGroup ID remained permanently assigned to a user after being invited to a group, even after their access to that group wa

Routine

HIGH 8.1UPGRADE

CVE-2026-40196 is a high-severity flaw (CVSS 8.1) affecting homebox. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

HomeBox is a home inventory and organization system. Versions prior to 0.25.0 contain a vulnerability where the defaultGroup ID remained permanently assigned to a user after being invited to a group, even after their access to that group was revoked. While the web interface correctly enforced the access revocation and prevented the user from viewing or modifying the group's contents, the API did not. Because the original group ID persisted as the

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	8.1 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.2% (top 84%)
CISA exploited list	No
Weakness	CWE-708
Published	2026-04-17
Last modified	2026-10-26

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

Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-17 21:16 UTCPublished CVE record published
2026-10-26 22:10 UTCUpdated Record last modified

sysadminsmedia homebox UPGRADE

Affected: < 0.25.0

Fixed in: 0.25.0

Safe to downgrade to: no unaffected older release

1. Check installed version

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

2. UPGRADE to 0.25.0 (Debian / Ubuntu)

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

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade homebox

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-2026-40196?

homebox: upgrade to 0.25.0. Exact commands for each OS are on this page.

Is CVE-2026-40196 being exploited?

CVE-2026-40196 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-2026-40196 affect?

CVE-2026-40196 affects homebox. Severity is high (CVSS 8.1). HomeBox is a home inventory and organization system. Versions prior to 0.25.0 contain a vulnerability where the defaultGroup ID remained permanently assigned to a user after being invited to a group, even after their access to that group wa

How urgent is CVE-2026-40196?

Priority 32/100. High severity

References

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