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CVE-2026-42137

30
FAUCET Score

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.

First published: May 9, 2026Last modified: May 12, 2026

Impacted Technologies

VendorProductVersion(s)CPE
< 4.9.0CPE matchmatch criteria
cpe:2.3:a:getkirby:kirby:*:*:*:*:*:*:*:*
>= 5.0.0, < 5.4.0CPE matchmatch criteria
cpe:2.3:a:getkirby:kirby:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 4.0

7.1HIGH

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
NONE
VS Confidentiality
HIGH
VS Integrity
NONE
VS Availability
NONE
SS Confidentiality
NONE
SS Integrity
NONE
SS Availability
NONE
Exploit Maturity
NOT_DEFINED
CvssVersion
4.0

Exploit Intelligence

EPSS Score
0.30%
Probability of exploitation in next 30 days
EPSS Percentile
22.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0030 is in the 29th percentile among its peer group of 21,958 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (3)

composerpatch availablevia ghsa
Product: getkirby/cmsFixed in: 4.9.0
composerpatch availablevia ghsa
Product: getkirby/cmsFixed in: 5.4.0
github_advisorypatch availablevia nvd_reference
View patch

Vendor Advisories (1)

composerGHSA-85x2-r8xv-ww8chigh

Kirby CMS's `pages.access/list` and `files.access/list` permissions are not consistently checked in the Panel and REST API

Apr 30, 2026

References

github.com / getkirby/kirby/releases/tag/4.9.0
Release Notes
github.com / getkirby/kirby/releases/tag/5.4.0
Release Notes
github.com / getkirby/kirby/security/advisories/GHSA-85x2-r8xv-ww8c
PatchVendor Advisory