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Vulnerability details: VCID-eu1n-h4bb-cbhk
Vulnerability ID VCID-eu1n-h4bb-cbhk
Aliases CVE-2026-42137
GHSA-85x2-r8xv-ww8c
Summary 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.
Status Published
Exploitability 0.5
Weighted Severity 8.0
Risk 4.0
Affected and Fixed Packages Package Details
Weaknesses (4)
CWE-862 Missing Authorization
CWE-863 Incorrect Authorization
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
System Score Found at
epss 0.00011 https://api.first.org/data/v1/epss?cve=CVE-2026-42137
epss 0.00011 https://api.first.org/data/v1/epss?cve=CVE-2026-42137
epss 0.00011 https://api.first.org/data/v1/epss?cve=CVE-2026-42137
cvssv3.1_qr HIGH https://github.com/advisories/GHSA-85x2-r8xv-ww8c
cvssv4 7.1 https://github.com/getkirby/kirby
generic_textual HIGH https://github.com/getkirby/kirby
cvssv4 7.1 https://github.com/getkirby/kirby/releases/tag/4.9.0
generic_textual HIGH https://github.com/getkirby/kirby/releases/tag/4.9.0
ssvc Track https://github.com/getkirby/kirby/releases/tag/4.9.0
cvssv4 7.1 https://github.com/getkirby/kirby/releases/tag/5.4.0
generic_textual HIGH https://github.com/getkirby/kirby/releases/tag/5.4.0
ssvc Track https://github.com/getkirby/kirby/releases/tag/5.4.0
cvssv3.1_qr HIGH https://github.com/getkirby/kirby/security/advisories/GHSA-85x2-r8xv-ww8c
cvssv4 7.1 https://github.com/getkirby/kirby/security/advisories/GHSA-85x2-r8xv-ww8c
generic_textual HIGH https://github.com/getkirby/kirby/security/advisories/GHSA-85x2-r8xv-ww8c
ssvc Track https://github.com/getkirby/kirby/security/advisories/GHSA-85x2-r8xv-ww8c
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2026-42137
https://github.com/getkirby/kirby
4.9.0 https://github.com/getkirby/kirby/releases/tag/4.9.0
5.4.0 https://github.com/getkirby/kirby/releases/tag/5.4.0
CVE-2026-42137 https://nvd.nist.gov/vuln/detail/CVE-2026-42137
GHSA-85x2-r8xv-ww8c https://github.com/advisories/GHSA-85x2-r8xv-ww8c
GHSA-85x2-r8xv-ww8c https://github.com/getkirby/kirby/security/advisories/GHSA-85x2-r8xv-ww8c
No exploits are available.
Vector: 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 Found at https://github.com/getkirby/kirby
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

network

adjacent

local

physical

low

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passive

active

high

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Vector: 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 Found at https://github.com/getkirby/kirby/releases/tag/4.9.0
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

network

adjacent

local

physical

low

high

none

present

none

low

high

none

passive

active

high

low

none

high

low

none

high

low

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low

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Vector: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2026-05-12T02:21:41Z/ Found at https://github.com/getkirby/kirby/releases/tag/4.9.0
Vector: 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 Found at https://github.com/getkirby/kirby/releases/tag/5.4.0
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

network

adjacent

local

physical

low

high

none

present

none

low

high

none

passive

active

high

low

none

high

low

none

high

low

none

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low

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Vector: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2026-05-12T02:21:41Z/ Found at https://github.com/getkirby/kirby/releases/tag/5.4.0
Vector: 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 Found at https://github.com/getkirby/kirby/security/advisories/GHSA-85x2-r8xv-ww8c
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

network

adjacent

local

physical

low

high

none

present

none

low

high

none

passive

active

high

low

none

high

low

none

high

low

none

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:N/A:N/T:P/P:M/B:A/M:M/D:T/2026-05-12T02:21:41Z/ Found at https://github.com/getkirby/kirby/security/advisories/GHSA-85x2-r8xv-ww8c
Exploit Prediction Scoring System (EPSS)
Percentile 0.01424
EPSS Score 0.00011
Published At June 11, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-06-11T16:44:20.081352+00:00 Vulnrichment Import https://github.com/cisagov/vulnrichment/blob/develop/2026/42xxx/CVE-2026-42137.json 38.6.0