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Vulnerability details: VCID-apwy-kpv6-1bfv
Vulnerability ID VCID-apwy-kpv6-1bfv
Aliases CVE-2026-34587
GHSA-jcjw-58rv-c452
Summary Kirby is an open-source content management system. Prior to versions 4.9.0 and 5.4.0, Kirby's user permissions control which user role is allowed to perform specific actions to content models in the CMS. These permissions are defined for each role in the user blueprint (`site/blueprints/users/...`). It is also possible to customize the permissions for each target model in the model blueprints (such as in `site/blueprints/pages/...`) using the `options` feature. The permissions and options together control the authorization of user actions. For pages, Kirby provides the `pages.create` and `pages.changeStatus` permissions (among others). In affected releases, Kirby checked these permissions independently and only for the respective action. However the `changeStatus` permission didn't take effect on page creation. New pages are created as drafts by default and need to be published by changing the page status of an existing page draft. This is ensured when the page is created via the Kirby Panel. However the REST API allows to override the `isDraft` flag when creating a new page. This allowed authenticated attackers with the `pages.create` permission to immediately create published pages, bypassing the normal editorial workflow. The problem has been patched in Kirby 4.9.0 and Kirby 5.4.0. Kirby has updated the `Options` logic to no longer double-resolve queries in option values coming from `OptionsQuery` or `OptionsApi` sources. Kirby now only resolves queries that are directly configured in the blueprints.
Status Published
Exploitability 0.5
Weighted Severity 8.0
Risk 4.0
Affected and Fixed Packages Package Details
Weaknesses (3)
CWE-1336 Improper Neutralization of Special Elements Used in a Template Engine
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 0.00033 https://api.first.org/data/v1/epss?cve=CVE-2026-34587
epss 0.00033 https://api.first.org/data/v1/epss?cve=CVE-2026-34587
epss 0.00033 https://api.first.org/data/v1/epss?cve=CVE-2026-34587
cvssv3.1_qr HIGH https://github.com/advisories/GHSA-jcjw-58rv-c452
cvssv3.1 8.1 https://github.com/getkirby/kirby
cvssv4 7.6 https://github.com/getkirby/kirby
generic_textual HIGH https://github.com/getkirby/kirby
cvssv3.1 8.1 https://github.com/getkirby/kirby/releases/tag/4.9.0
cvssv4 7.6 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
cvssv3.1 8.1 https://github.com/getkirby/kirby/releases/tag/5.4.0
cvssv4 7.6 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 8.1 https://github.com/getkirby/kirby/security/advisories/GHSA-jcjw-58rv-c452
cvssv3.1_qr HIGH https://github.com/getkirby/kirby/security/advisories/GHSA-jcjw-58rv-c452
cvssv4 7.6 https://github.com/getkirby/kirby/security/advisories/GHSA-jcjw-58rv-c452
generic_textual HIGH https://github.com/getkirby/kirby/security/advisories/GHSA-jcjw-58rv-c452
ssvc Track https://github.com/getkirby/kirby/security/advisories/GHSA-jcjw-58rv-c452
cvssv3.1 8.1 https://nvd.nist.gov/vuln/detail/CVE-2026-34587
cvssv4 7.6 https://nvd.nist.gov/vuln/detail/CVE-2026-34587
generic_textual HIGH https://nvd.nist.gov/vuln/detail/CVE-2026-34587
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2026-34587
https://github.com/getkirby/kirby
https://nvd.nist.gov/vuln/detail/CVE-2026-34587
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
GHSA-jcjw-58rv-c452 https://github.com/advisories/GHSA-jcjw-58rv-c452
GHSA-jcjw-58rv-c452 https://github.com/getkirby/kirby/security/advisories/GHSA-jcjw-58rv-c452
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N Found at https://github.com/getkirby/kirby
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

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none

high

low

none

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low

none
Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/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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none

present

none

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passive

active

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Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N Found at https://github.com/getkirby/kirby/releases/tag/4.9.0
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/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

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Vector: SSVCv2/E:N/A:N/T:T/P:M/B:A/M:M/D:T/2026-04-24T17:10:14Z/ Found at https://github.com/getkirby/kirby/releases/tag/4.9.0
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N Found at https://github.com/getkirby/kirby/releases/tag/5.4.0
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/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

high

low

none

high

low

none

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low

none
Vector: SSVCv2/E:N/A:N/T:T/P:M/B:A/M:M/D:T/2026-04-24T17:10:14Z/ Found at https://github.com/getkirby/kirby/releases/tag/5.4.0
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N Found at https://github.com/getkirby/kirby/security/advisories/GHSA-jcjw-58rv-c452
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N Found at https://github.com/getkirby/kirby/security/advisories/GHSA-jcjw-58rv-c452
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:T/P:M/B:A/M:M/D:T/2026-04-24T17:10:14Z/ Found at https://github.com/getkirby/kirby/security/advisories/GHSA-jcjw-58rv-c452
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2026-34587
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N Found at https://nvd.nist.gov/vuln/detail/CVE-2026-34587
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
Exploit Prediction Scoring System (EPSS)
Percentile 0.10257
EPSS Score 0.00033
Published At June 11, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-06-11T16:47:29.018691+00:00 Vulnrichment Import https://github.com/cisagov/vulnrichment/blob/develop/2026/34xxx/CVE-2026-34587.json 38.6.0