CVE-2026-2742

{"id": "CVE-2026-2742", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.3, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 1.4, "exploitabilityScore": 3.9}], "cvssMetricV40": [{"type": "Secondary", "source": "security@vaadin.com", "cvssData": {"Safety": "NEGLIGIBLE", "version": "4.0", "Recovery": "AUTOMATIC", "baseScore": 5.3, "Automatable": "YES", "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "valueDensity": "DIFFUSE", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:L/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:N/AU:Y/R:A/V:D/RE:L/U:Amber", "exploitMaturity": "NOT_DEFINED", "providerUrgency": "AMBER", "userInteraction": "NONE", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "LOW", "subIntegrityImpact": "NONE", "vulnIntegrityImpact": "NONE", "integrityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "subAvailabilityImpact": "LOW", "vulnAvailabilityImpact": "LOW", "availabilityRequirement": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "subConfidentialityImpact": "NONE", "vulnConfidentialityImpact": "NONE", "confidentialityRequirement": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "vulnerabilityResponseEffort": "LOW", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED"}}]}, "published": "2026-03-10T18:18:49.410", "references": [{"url": "https://github.com/vaadin/flow/pull/22998", "tags": ["Issue Tracking", "Patch"], "source": "security@vaadin.com"}, {"url": "https://github.com/vaadin/flow/pull/23033", "tags": ["Issue Tracking", "Patch"], "source": "security@vaadin.com"}, {"url": "https://github.com/vaadin/flow/pull/23034", "tags": ["Issue Tracking", "Patch"], "source": "security@vaadin.com"}, {"url": "https://github.com/vaadin/flow/pull/23037", "tags": ["Issue Tracking", "Patch"], "source": "security@vaadin.com"}, {"url": "https://github.com/vaadin/flow/pull/23052", "tags": ["Issue Tracking", "Patch"], "source": "security@vaadin.com"}, {"url": "https://github.com/vaadin/flow/pull/23057", "tags": ["Issue Tracking", "Patch"], "source": "security@vaadin.com"}, {"url": "https://vaadin.com/security/cve-2026-2742", "tags": ["Vendor Advisory"], "source": "security@vaadin.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "security@vaadin.com", "description": [{"lang": "en", "value": "CWE-284"}]}, {"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "NVD-CWE-Other"}]}], "descriptions": [{"lang": "en", "value": "An authentication bypass vulnerability exists in Vaadin 14.0.0 through 14.14.0, 23.0.0 through 23.6.6, 24.0.0 through 24.9.7 and 25.0.0 through 25.0.1,\u00a0applications using Spring Security due to inconsistent path pattern matching of reserved framework paths.\n\nAccessing the /VAADIN endpoint without a trailing slash bypasses security filters, and allowing unauthenticated users to trigger framework initialization and create sessions without proper authorization.\n\nUsers of affected versions using Spring Security should upgrade as follows: 14.0.0-14.14.0 upgrade to 14.14.1,\u00a023.0.0-23.6.6 to\u00a023.6.7,\u00a024.0.0 - 24.9.7 to\u00a024.9.8, and\u00a025.0.0-25.0.1 upgrade to\u00a025.0.2 or newer.\n\nPlease note that Vaadin versions 10-13 and 15-22 are no longer supported and you should update either to the latest 14, 23, 24, 25 version."}, {"lang": "es", "value": "Una vulnerabilidad de omisi\u00f3n de autenticaci\u00f3n existe en Vaadin 14.0.0 hasta 14.14.0, 23.0.0 hasta 23.6.6, 24.0.0 hasta 24.9.7 y 25.0.0 hasta 25.0.1, aplicaciones que usan Spring Security debido a la coincidencia inconsistente de patrones de ruta de las rutas reservadas del framework.\n\nAcceder al endpoint /VAADIN sin una barra diagonal final omite los filtros de seguridad, y permite a los usuarios no autenticados activar la inicializaci\u00f3n del framework y crear sesiones sin la autorizaci\u00f3n adecuada.\n\nLos usuarios de las versiones afectadas que usan Spring Security deben actualizar de la siguiente manera: 14.0.0-14.14.0 actualizar a 14.14.1, 23.0.0-23.6.6 a 23.6.7, 24.0.0 - 24.9.7 a 24.9.8, y 25.0.0-25.0.1 actualizar a 25.0.2 o m\u00e1s reciente.\n\nTenga en cuenta que las versiones de Vaadin 10-13 y 15-22 ya no son compatibles y debe actualizar a la \u00faltima versi\u00f3n 14, 23, 24 o 25."}], "lastModified": "2026-05-07T18:40:35.867", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:vaadin:vaadin:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "5C9F8AFE-37CC-4B3F-93E4-29C553C4F179", "versionEndExcluding": "14.14.1", "versionStartIncluding": "10.0.0"}, {"criteria": "cpe:2.3:a:vaadin:vaadin:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "619712A7-0E1B-40FC-984C-BB6445692C9F", "versionEndExcluding": "23.6.7", "versionStartIncluding": "15.0.0"}, {"criteria": "cpe:2.3:a:vaadin:vaadin:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "4407B761-A423-46FA-BEA3-6DC6CB3660BC", "versionEndExcluding": "24.9.8", "versionStartIncluding": "24.0.0"}, {"criteria": "cpe:2.3:a:vaadin:vaadin:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "5ECFA844-2F8D-4736-ABA2-24058A512621", "versionEndExcluding": "25.0.2", "versionStartIncluding": "25.0.0"}], "operator": "OR"}]}], "sourceIdentifier": "security@vaadin.com"}