FKIE_CVE-2026-2742

Vulnerability from fkie_nvd - Published: 2026-03-10 18:18 - Updated: 2026-03-11 13:53
Severity ?
5.3 (Medium) - 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/S:N/AU:Y/R:A/V:D/RE:L/U:Amber
Summary
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, applications using Spring Security due to inconsistent path pattern matching of reserved framework paths. Accessing the /VAADIN endpoint without a trailing slash bypasses security filters, and allowing unauthenticated users to trigger framework initialization and create sessions without proper authorization. Users of affected versions using Spring Security should upgrade as follows: 14.0.0-14.14.0 upgrade to 14.14.1, 23.0.0-23.6.6 to 23.6.7, 24.0.0 - 24.9.7 to 24.9.8, and 25.0.0-25.0.1 upgrade to 25.0.2 or newer. Please 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.
References
security@vaadin.comhttps://github.com/vaadin/flow/pull/22998
security@vaadin.comhttps://github.com/vaadin/flow/pull/23033
security@vaadin.comhttps://github.com/vaadin/flow/pull/23034
security@vaadin.comhttps://github.com/vaadin/flow/pull/23037
security@vaadin.comhttps://github.com/vaadin/flow/pull/23052
security@vaadin.comhttps://github.com/vaadin/flow/pull/23057
security@vaadin.comhttps://vaadin.com/security/cve-2026-2742
Impacted products
Vendor Product Version
To clipboard 

{
  "cveTags": [],
  "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."
    }
  ],
  "id": "CVE-2026-2742",
  "lastModified": "2026-03-11T13:53:20.707",
  "metrics": {
    "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"
      }
    ]
  },
  "published": "2026-03-10T18:18:49.410",
  "references": [
    {
      "source": "security@vaadin.com",
      "url": "https://github.com/vaadin/flow/pull/22998"
    },
    {
      "source": "security@vaadin.com",
      "url": "https://github.com/vaadin/flow/pull/23033"
    },
    {
      "source": "security@vaadin.com",
      "url": "https://github.com/vaadin/flow/pull/23034"
    },
    {
      "source": "security@vaadin.com",
      "url": "https://github.com/vaadin/flow/pull/23037"
    },
    {
      "source": "security@vaadin.com",
      "url": "https://github.com/vaadin/flow/pull/23052"
    },
    {
      "source": "security@vaadin.com",
      "url": "https://github.com/vaadin/flow/pull/23057"
    },
    {
      "source": "security@vaadin.com",
      "url": "https://vaadin.com/security/cve-2026-2742"
    }
  ],
  "sourceIdentifier": "security@vaadin.com",
  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-284"
        }
      ],
      "source": "security@vaadin.com",
      "type": "Secondary"
    }
  ]
}


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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.