CVE-2026-45368

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{"affected": [{"affectedData": [{"product": "kirby", "vendor": "getkirby", "versions": [{"status": "affected", "version": "< 4.9.1"}, {"status": "affected", "version": ">= 5.0.0, < 5.4.1"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Kirby is an open-source content management system. In versions prior to 4.9.1 and 5.4.1, the underlying URL methods for the KirbyTags and image blocks components did not filter out malicious URL values that resolve to script execution. The vulnerability affects four first-party Kirby renderers that produce `<a href=\"\u2026\">`\u00a0output from editor-supplied field values: the\u00a0(`link: \u2026)` KirbyTag, the `link`: parameter of the `(image: \u2026)`\u00a0KirbyTag when it does not resolve to a known file or `self`, the\u00a0`link`\u00a0field of the built-in image block, and the HTML importer for the `blocks` field (which accepted the same malicious input as the image block `link` field). While simple `avascript:` URLs were already deactivated by treating them as a relative path and prepending a single slash to the URL, the use of URLs of the format `javascript://x%0A\u2026` bypasses this protection. The `vbscript:`, `data:`, `livescript:`, `mocha:` and `jar:` schemes are affected by the same underlying gap. This issue has been fixed in versions 4.9.1 and 5.4.1."}, {"lang": "es", "value": "Kirby es un sistema de gesti\u00f3n de contenido de c\u00f3digo abierto. En versiones anteriores a la 4.9.1 y 5.4.1, los m\u00e9todos URL subyacentes para los componentes KirbyTags y bloques de imagen no filtraban valores URL maliciosos que resultaban en la ejecuci\u00f3n de scripts. La vulnerabilidad afecta a cuatro renderizadores de Kirby de primera parte que producen una salida \u201c<a href=\u201c...\u201d>\u201d a partir de valores de campo proporcionados por el editor: el KirbyTag (\u201clink: ...)\u201d , el par\u00e1metro \u201clink\u201d: del KirbyTag \u201c(image: ...)\u201d cuando no se resuelve en un archivo conocido o \u201cself\u201d, el campo \u201clink\u201d del bloque de imagen incorporado, y el importador HTML para el campo \u201cblocks\u201d (que aceptaba la misma entrada maliciosa que el campo \u201clink\u201d del bloque de imagen). Aunque las URL simples \u201cjavascript_disabled: \u201d ya estaban desactivadas al tratarlas como una ruta relativa y anteponer una sola barra a la URL, el uso de URL con el formato \u201cjavascript_disabled: //x%0A...\u201d elude esta protecci\u00f3n. Los esquemas \u201cvbscript:\u201d, \u201cdata:\u201d, \u201clivescript:\u201d, \u201cmocha:\u201d y \u201cjar:\u201d se ven afectados por la misma brecha subyacente. Este problema ha sido solucionado en las versiones 4.9.1 y 5.4.1."}], "id": "CVE-2026-45368", "lastModified": "2026-10-24T20:10:00.137", "metrics": {"cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 8.4, "baseSeverity": "HIGH", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "LOW", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "ACTIVE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:H/VI:H/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", "version": "4.0", "vulnAvailabilityImpact": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-45368", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-07-18T03:18:47.584293Z", "version": "2.0.3"}}]}, "published": "2026-07-16T22:17:02.680", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/getkirby/kirby/releases/tag/5.4.1"}, {"source": "security-advisories@github.com", "url": "https://github.com/getkirby/kirby/security/advisories/GHSA-qvjf-922g-pj44"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-79"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

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