How severe is CVE-2026-27600?

CVE-2026-27600 has a CVSS 3.x base score of 5.0, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2026-27600 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (8th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-27600?

CVE-2026-27600 affects Sysadminsmedia Homebox. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-27600?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-27600 have an EU (EUVD) identifier?

Yes. CVE-2026-27600 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-9335.

When was CVE-2026-27600 published?

CVE-2026-27600 was published on 2026-03-03 and last updated on 2026-06-17.

CVE-2026-27600

CVE-2026-27600 is a medium-severity vulnerability in Sysadminsmedia Homebox with a CVSS 3.x base score of 5.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-918.

Key facts

Severity: Medium (CVSS 3.x base score 5.0)
EPSS exploit prediction: 0% (8th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-9335
Weakness: CWE-918
Affected product: Sysadminsmedia Homebox
Published: 2026-03-03
Last modified: 2026-06-17

Description

HomeBox is a home inventory and organization system. Prior to 0.24.0-rc.1, the notifier functionality allows authenticated users to specify arbitrary URLs to which the application sends HTTP POST requests. No validation or restriction is applied to the supplied host, IP address, or port. Although the application does not return the response body from the target service, its UI behavior differs depending on the network state of the destination. This creates a behavioral side-channel that enables internal service enumeration. This vulnerability is fixed in 0.24.0-rc.1.

Frequently asked questions

What is CVE-2026-27600?: HomeBox is a home inventory and organization system. Prior to 0.24.0-rc.1, the notifier functionality allows authenticated users to specify arbitrary URLs to which the application sends HTTP POST requests. No validation or restriction is applied to the supplied host, IP address, or port. Although the application does not return the response body from the target service, its UI behavior differs depending on the network state of the destination. This creates a behavioral side-channel that enables internal service enumeration. This vulnerability is fixed in 0.24.0-rc.1.
How severe is CVE-2026-27600?: CVE-2026-27600 has a CVSS 3.x base score of 5.0, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2026-27600 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (8th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-27600?: CVE-2026-27600 affects Sysadminsmedia Homebox. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-27600?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-27600 have an EU (EUVD) identifier?: Yes. CVE-2026-27600 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-9335.
When was CVE-2026-27600 published?: CVE-2026-27600 was published on 2026-03-03 and last updated on 2026-06-17.

References

https://github.com/sysadminsmedia/homebox/security/advisories/GHSA-cm7p-5mg5-82pm

Affected products (1)

cpe:2.3:a:sysadminsmedia:homebox:*:*:*:*:*:*:*:*

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