CVE-2026-42051

Kirby is an open-source content management system. Prior to versions 4.9.0 and 5.4.0, the system API endpoint leaks license data and installed version to authenticated users. This issue has been patched in versions 4.9.0 and 5.4.0.

CVSS v3 4.3 MEDIUM

4.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/getkirby/kirby/releases/tag/4.9.0	Release Notes
https://github.com/getkirby/kirby/releases/tag/5.4.0	Release Notes
https://github.com/getkirby/kirby/security/advisories/GHSA-x68m-c7jf-2572	Patch Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:getkirby:kirby::::::::
	cpe:2.3:a:getkirby:kirby::::::::

History

No history.

Information

Published : 2026-05-09 04:16

Updated : 2026-07-24 21:10

NVD link : CVE-2026-42051

Mitre link : CVE-2026-42051

CVE.ORG link : CVE-2026-42051

JSON object : View

Products Affected

getkirby

kirby

CWE

CWE-862

Missing Authorization

{"id": "CVE-2026-42051", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-42051", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-05-11T14:40:16.591329Z"}}], "cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 4.3, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "LOW"}, "impactScore": 1.4, "exploitabilityScore": 2.8}], "cvssMetricV40": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"Safety": "NOT_DEFINED", "version": "4.0", "Recovery": "NOT_DEFINED", "baseScore": 5.3, "Automatable": "NOT_DEFINED", "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/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", "exploitMaturity": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "userInteraction": "NONE", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "LOW", "subIntegrityImpact": "NONE", "vulnIntegrityImpact": "NONE", "integrityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "availabilityRequirement": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "subConfidentialityImpact": "NONE", "vulnConfidentialityImpact": "LOW", "confidentialityRequirement": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED"}}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "getkirby", "product": "kirby", "versions": [{"status": "affected", "version": "< 4.9.0"}, {"status": "affected", "version": ">= 5.0.0, < 5.4.0"}]}]}], "published": "2026-05-09T04:16:22.110", "references": [{"url": "https://github.com/getkirby/kirby/releases/tag/4.9.0", "tags": ["Release Notes"], "source": "security-advisories@github.com"}, {"url": "https://github.com/getkirby/kirby/releases/tag/5.4.0", "tags": ["Release Notes"], "source": "security-advisories@github.com"}, {"url": "https://github.com/getkirby/kirby/security/advisories/GHSA-x68m-c7jf-2572", "tags": ["Patch", "Vendor Advisory"], "source": "security-advisories@github.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-862"}]}], "descriptions": [{"lang": "en", "value": "Kirby is an open-source content management system. Prior to versions 4.9.0 and 5.4.0, the system API endpoint leaks license data and installed version to authenticated users. This issue has been patched in versions 4.9.0 and 5.4.0."}, {"lang": "es", "value": "Kirby es un sistema de gesti\u00f3n de contenido de c\u00f3digo abierto. Antes de las versiones 4.9.0 y 5.4.0, el endpoint de la API del sistema filtra datos de licencia y la versi\u00f3n instalada a usuarios autenticados. Este problema ha sido parcheado en las versiones 4.9.0 y 5.4.0."}], "lastModified": "2026-07-24T21:10:00.143", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:getkirby:kirby:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "1BB5394F-37F9-4A53-9CE7-79548F674886", "versionEndExcluding": "4.9.0"}, {"criteria": "cpe:2.3:a:getkirby:kirby:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "B2D943B9-CD71-45FE-A1A4-158603C3502E", "versionEndExcluding": "5.4.0", "versionStartIncluding": "5.0.0"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}