CVE-2026-44255

{
  "id": "CVE-2026-44255",
  "sourceIdentifier": "[email protected]",
  "published": "2026-08-19T17:18:48.770",
  "lastModified": "2026-10-26T11:10:00.157",
  "vulnStatus": "Analyzed",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Wazuh is a free and open source platform used for threat prevention, detection, and response. From 4.0.0 until 4.14.6 and 5.0.0-beta2, AuthenticationManager.check_user() in framework/wazuh/rbac/orm.py performs check_password_hash() only when the supplied username exists. A nonexistent username returns immediately, while a valid username causes an expensive bcrypt calculation. An unauthenticated remote attacker can compare authentication response times to enumerate valid Wazuh usernames and use that information in subsequent credential attacks. This issue is fixed in versions 4.14.6 and 5.0.0-beta2."
    },
    {
      "lang": "es",
      "value": "Wazuh es una plataforma de código abierto y gratuita utilizada para la prevención, detección y respuesta a amenazas. Desde la versión 4.0.0 hasta la 4.14.6 y la 5.0.0-beta2, AuthenticationManager.check_user() en framework/wazuh/rbac/orm.py realiza check_password_hash() solo cuando el nombre de usuario proporcionado existe. Un nombre de usuario inexistente retorna inmediatamente, mientras que un nombre de usuario válido provoca un cálculo bcrypt costoso. Un atacante remoto no autenticado puede comparar los tiempos de respuesta de autenticación para enumerar nombres de usuario válidos de Wazuh y utilizar esa información en ataques de credenciales posteriores. Este problema está solucionado en las versiones 4.14.6 y 5.0.0-beta2."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "wazuh",
          "product": "wazuh",
          "versions": [
            {
              "version": ">= 4.0.0, < 4.14.6",
              "status": "affected"
            },
            {
              "version": ">= 5.0.0-beta1, < 5.0.0-beta2",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
          "baseScore": 5.3,
          "baseSeverity": "MEDIUM",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "LOW",
          "integrityImpact": "NONE",
          "availabilityImpact": "NONE"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 1.4
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-08-25T02:16:49.674139Z",
          "id": "CVE-2026-44255",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-208"
        }
      ]
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "operator": "OR",
          "negate": false,
          "cpeMatch": [
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:wazuh:wazuh:*:*:*:*:*:*:*:*",
              "versionStartIncluding": "4.0.0",
              "versionEndExcluding": "4.14.6",
              "matchCriteriaId": "E34130E3-89D7-4413-B1F0-0434248CD325"
            },
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:wazuh:wazuh:5.0.0:beta1:*:*:*:*:*:*",
              "matchCriteriaId": "007B01AA-AED0-4E92-8999-07E74B630460"
            }
          ]
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/wazuh/wazuh/commit/5ecea7b38b998407cb0d205467dd247140a0f981",
      "source": "[email protected]",
      "tags": [
        "Patch"
      ]
    },
    {
      "url": "https://github.com/wazuh/wazuh/pull/35757",
      "source": "[email protected]",
      "tags": [
        "Issue Tracking",
        "Patch"
      ]
    },
    {
      "url": "https://github.com/wazuh/wazuh/releases/tag/v4.14.6",
      "source": "[email protected]",
      "tags": [
        "Release Notes"
      ]
    },
    {
      "url": "https://github.com/wazuh/wazuh/releases/tag/v5.0.0-beta2",
      "source": "[email protected]",
      "tags": [
        "Release Notes"
      ]
    },
    {
      "url": "https://github.com/wazuh/wazuh/security/advisories/GHSA-3978-44q9-9px9",
      "source": "[email protected]",
      "tags": [
        "Exploit",
        "Vendor Advisory"
      ]
    },
    {
      "url": "https://github.com/wazuh/wazuh/security/advisories/GHSA-3978-44q9-9px9",
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "tags": [
        "Exploit",
        "Vendor Advisory"
      ]
    }
  ]
}