CVE-2026-2742

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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."}], "id": "CVE-2026-2742", "lastModified": "2026-06-17T10:31:38.390", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 1.4, "source": "nvd@nist.gov", "type": "Primary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "YES", "Recovery": "AUTOMATIC", "Safety": "NEGLIGIBLE", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 5.3, "baseSeverity": "MEDIUM", "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": "AMBER", "subAvailabilityImpact": "LOW", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "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", "version": "4.0", "vulnAvailabilityImpact": "LOW", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "LOW"}, "source": "security@vaadin.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-2742", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-03-10T13:42:57.456886Z", "version": "2.0.3"}}]}, "published": "2026-03-10T18:18:49.410", "references": [{"source": "security@vaadin.com", "tags": ["Issue Tracking", "Patch"], "url": "https://github.com/vaadin/flow/pull/22998"}, {"source": "security@vaadin.com", "tags": ["Issue Tracking", "Patch"], "url": "https://github.com/vaadin/flow/pull/23033"}, {"source": "security@vaadin.com", "tags": ["Issue Tracking", "Patch"], "url": "https://github.com/vaadin/flow/pull/23034"}, {"source": "security@vaadin.com", "tags": ["Issue Tracking", "Patch"], "url": "https://github.com/vaadin/flow/pull/23037"}, {"source": "security@vaadin.com", "tags": ["Issue Tracking", "Patch"], "url": "https://github.com/vaadin/flow/pull/23052"}, {"source": "security@vaadin.com", "tags": ["Issue Tracking", "Patch"], "url": "https://github.com/vaadin/flow/pull/23057"}, {"source": "security@vaadin.com", "tags": ["Vendor Advisory"], "url": "https://vaadin.com/security/cve-2026-2742"}], "sourceIdentifier": "security@vaadin.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-284"}], "source": "security@vaadin.com", "type": "Secondary"}, {"description": [{"lang": "en", "value": "NVD-CWE-Other"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "com.vaadin/flow-server: Vaadin flow-server: Authentication bypass due to inconsistent path matching allows unauthorized session creation.", "id": "2446005", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2446005"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.3", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L", "status": "draft"}, "cwe": "CWE-551", "details": ["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.\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.\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.\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.", "A flaw was found in com.vaadin/flow-server. This authentication bypass vulnerability allows an unauthenticated attacker to bypass security filters by accessing the /VAADIN endpoint without a trailing slash. This inconsistent path pattern matching enables the attacker to trigger framework initialization and create sessions without proper authorization, potentially leading to unauthorized access and information disclosure."], "mitigation": {"lang": "en:us", "value": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability."}, "name": "CVE-2026-2742", "package_state": [{"cpe": "cpe:/a:redhat:jboss_enterprise_application_platform:8", "fix_state": "Fix deferred", "package_name": "flow-server", "product_name": "Red Hat JBoss Enterprise Application Platform 8"}, {"cpe": "cpe:/a:redhat:jbosseapxp", "fix_state": "Fix deferred", "package_name": "flow-server", "product_name": "Red Hat JBoss Enterprise Application Platform Expansion Pack"}], "public_date": "2026-03-10T12:08:48Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-2742\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-2742\nhttps://github.com/vaadin/flow/pull/22998\nhttps://github.com/vaadin/flow/pull/23037\nhttps://github.com/vaadin/flow/pull/23057\nhttps://vaadin.com/security/cve-2026-2742"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[14.0.0,14.14.0]"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[23.0.0,23.6.6]"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[24.0.0,24.9.7]"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[25.0.0,25.0.1]"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "flow", "source": "cna", "vendor": "vaadin"}, "product": "flow", "vendor": "vaadin"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[14.0.0,14.14.0]"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[23.0.0,23.6.6]"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[24.0.0,24.9.7]"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[25.0.0,25.0.1]"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "vaadin", "source": "cna", "vendor": "vaadin"}, "product": "vaadin", "vendor": "vaadin"}], "created": "2026-03-11T11:50:15.540260+00:00", "updated": "2026-05-07T19:30:27.401312+00:00", "vendors": ["vaadin", "vaadin$PRODUCT$flow", "vaadin$PRODUCT$vaadin"]}