FKIE_CVE-2026-45798

Vulnerability from fkie_nvd - Published: 2026-08-19 17:18 - Updated: 2026-08-19 18:16
Severity
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Summary
Wazuh is a free and open source platform used for threat prevention, detection, and response. From 4.5.0 until 4.14.6 and 5.0.0-beta2, compare_wazuh_versions() in src/shared/version_op.c copies the attacker-controlled enrollment V: field into a 10-byte stack buffer with strncpy() but does not explicitly terminate the buffer. The function is reachable before authentication through wazuh-authd on TCP port 1515 when anonymous TLS enrollment is enabled. A version string of at least nine non-null bytes can cause strchr() and strtok() to read beyond ver2 and can make strtok() write a null byte into adjacent stack memory, allowing a remote denial of service. This issue is fixed in versions 4.14.6 and 5.0.0-beta2.
References
security-advisories@github.comhttps://github.com/wazuh/wazuh/commit/b6aac379982d6144b8da38450cbea6c8dc15be44
security-advisories@github.comhttps://github.com/wazuh/wazuh/pull/36059
security-advisories@github.comhttps://github.com/wazuh/wazuh/releases/tag/v4.14.6
security-advisories@github.comhttps://github.com/wazuh/wazuh/releases/tag/v5.0.0-beta2
security-advisories@github.comhttps://github.com/wazuh/wazuh/security/advisories/GHSA-4fvp-jfc3-qr6r
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "wazuh",
          "vendor": "wazuh",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 4.5.0, \u003c 4.14.6"
            },
            {
              "status": "affected",
              "version": "\u003e= 5.0.0-beta1, \u003c 5.0.0-beta2"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Wazuh is a free and open source platform used for threat prevention, detection, and response. From 4.5.0 until 4.14.6 and 5.0.0-beta2, compare_wazuh_versions() in src/shared/version_op.c copies the attacker-controlled enrollment V: field into a 10-byte stack buffer with strncpy() but does not explicitly terminate the buffer. The function is reachable before authentication through wazuh-authd on TCP port 1515 when anonymous TLS enrollment is enabled. A version string of at least nine non-null bytes can cause strchr() and strtok() to read beyond ver2 and can make strtok() write a null byte into adjacent stack memory, allowing a remote denial of service. This issue is fixed in versions 4.14.6 and 5.0.0-beta2."
    }
  ],
  "id": "CVE-2026-45798",
  "lastModified": "2026-08-19T18:16:39.973",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-45798",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-08-19T17:17:27.587788Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-08-19T17:18:49.730",
  "references": [
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/wazuh/wazuh/commit/b6aac379982d6144b8da38450cbea6c8dc15be44"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/wazuh/wazuh/pull/36059"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/wazuh/wazuh/releases/tag/v4.14.6"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/wazuh/wazuh/releases/tag/v5.0.0-beta2"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/wazuh/wazuh/security/advisories/GHSA-4fvp-jfc3-qr6r"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Received",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-121"
        },
        {
          "lang": "en",
          "value": "CWE-170"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}



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