CVE-2026-39424

{"id": "CVE-2026-39424", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-39424", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-04-16T13:22:56.887003Z"}}], "cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 4.7, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L", "integrityImpact": "LOW", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "LOW", "privilegesRequired": "HIGH", "confidentialityImpact": "LOW"}, "impactScore": 3.4, "exploitabilityScore": 1.2}], "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:L/VA:L/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": "LOW", "integrityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "vulnAvailabilityImpact": "LOW", "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": "1Panel-dev", "product": "MaxKB", "versions": [{"status": "affected", "version": "< 2.8.0"}]}]}], "published": "2026-04-14T01:16:05.153", "references": [{"url": "https://github.com/1Panel-dev/MaxKB/commit/24cd68acae5f726eed828e2ac801827a2a70536f", "tags": ["Patch"], "source": "security-advisories@github.com"}, {"url": "https://github.com/1Panel-dev/MaxKB/releases/tag/v2.8.0", "tags": ["Release Notes"], "source": "security-advisories@github.com"}, {"url": "https://github.com/1Panel-dev/MaxKB/security/advisories/GHSA-rr4r-7cj2-29vp", "tags": ["Vendor Advisory"], "source": "security-advisories@github.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-1236"}]}], "descriptions": [{"lang": "en", "value": "MaxKB is an open-source AI assistant for enterprise. In versions 2.7.1 and below, the chat export feature is vulnerable to Improper Neutralization of Formula Elements in a CSV File. When an administrator exports the application chat history to an Excel file (.xlsx) via the /admin/api/workspace/{workspace_id}/application/{application_id}/chat/export endpoint, strings starting with formula characters are written directly without proper sanitization. Opening this file in spreadsheet applications like Microsoft Excel can lead to Arbitrary Code Execution (RCE) on the administrator's workstation via Dynamic Data Exchange (DDE). The issue is a variant of CVE-2025-4546, which fixed the exact same pattern in apps/dataset/serializers/document_serializers.py but missed the application chat export sink. This issue has been fixed in version 2.8.0."}, {"lang": "es", "value": "MaxKB es un asistente de IA de c\u00f3digo abierto para empresas. En las versiones 2.7.1 e inferiores, la funci\u00f3n de exportaci\u00f3n de chat es vulnerable a la Neutralizaci\u00f3n Incorrecta de Elementos de F\u00f3rmula en un Archivo CSV. Cuando un administrador exporta el historial de chat de la aplicaci\u00f3n a un archivo de Excel (.xlsx) a trav\u00e9s del endpoint /admin/API/workspace/{workspace_id}/application/{application_id}/chat/export, las cadenas que comienzan con caracteres de f\u00f3rmula se escriben directamente sin la sanitizaci\u00f3n adecuada. Abrir este archivo en aplicaciones de hoja de c\u00e1lculo como Microsoft Excel puede llevar a la Ejecuci\u00f3n de C\u00f3digo Arbitrario (RCE) en la estaci\u00f3n de trabajo del administrador a trav\u00e9s de Dynamic Data Exchange (DDE). El problema es una variante de CVE-2025-4546, que corrigi\u00f3 exactamente el mismo patr\u00f3n en apps/dataset/serializers/document_serializers.py pero omiti\u00f3 el sumidero de exportaci\u00f3n de chat de la aplicaci\u00f3n. Este problema ha sido corregido en la versi\u00f3n 2.8.0."}], "lastModified": "2026-10-26T22:10:00.163", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:maxkb:maxkb:*:*:*:*:-:*:*:*", "vulnerable": true, "matchCriteriaId": "8BB376B6-4E9C-4801-9D33-5BF858C857D2", "versionEndExcluding": "2.8.0"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}