How severe is CVE-2026-42137?

CVE-2026-42137 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2026-42137 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (22nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-42137?

CVE-2026-42137 affects Getkirby Kirby. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-42137?

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

Does CVE-2026-42137 have an EU (EUVD) identifier?

Yes. CVE-2026-42137 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-28889.

When was CVE-2026-42137 published?

CVE-2026-42137 was published on 2026-05-09 and last updated on 2026-06-17.

CVE-2026-42137

CVE-2026-42137 is a medium-severity vulnerability in Getkirby Kirby with a CVSS 3.x base score of 6.5. 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-862.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v4: 7.1
EPSS exploit prediction: 0% (22nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-28889
Weakness: CWE-862
Affected product: Getkirby Kirby
Published: 2026-05-09
Last modified: 2026-06-17

Description

Kirby is an open-source content management system. Prior to versions 4.9.0 and 5.4.0, `pages.access/list` and `files.access/list` permissions are not consistently checked in the Panel and REST API. This issue has been patched in versions 4.9.0 and 5.4.0.

Frequently asked questions

What is CVE-2026-42137?: Kirby is an open-source content management system. Prior to versions 4.9.0 and 5.4.0, `pages.access/list` and `files.access/list` permissions are not consistently checked in the Panel and REST API. This issue has been patched in versions 4.9.0 and 5.4.0.
How severe is CVE-2026-42137?: CVE-2026-42137 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2026-42137 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (22nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-42137?: CVE-2026-42137 affects Getkirby Kirby. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-42137?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-42137 have an EU (EUVD) identifier?: Yes. CVE-2026-42137 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-28889.
When was CVE-2026-42137 published?: CVE-2026-42137 was published on 2026-05-09 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:getkirby:kirby:*:*:*:*:*:*:*:*

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