CVE-2026-53523

{
  "id": "CVE-2026-53523",
  "sourceIdentifier": "[email protected]",
  "published": "2026-06-12T22:16:52.523",
  "lastModified": "2026-10-25T23:10:00.167",
  "vulnStatus": "Deferred",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Nezha Monitoring is a self-hostable, lightweight, servers and websites monitoring and O&M tool. From version 1.0.0 to before version 2.2.0, the getRedirectURL function in oauth2.go:22-29 constructs the OAuth2 callback URL by concatenating the request's Host header with a fixed path, with zero validation of the Host header. This can result in host header injection. This issue has been patched in version 2.2.0."
    },
    {
      "lang": "es",
      "value": "Nezha Monitoring es una herramienta autoalojable, ligera, de monitoreo de servidores y sitios web, y de O&M. Desde la versión 1.0.0 hasta antes de la versión 2.2.0, la función getRedirectURL en oauth2.go:22-29 construye la URL de callback de OAuth2 concatenando el encabezado Host de la solicitud con una ruta fija, sin ninguna validación del encabezado Host. Esto puede resultar en inyección de encabezado Host. Este problema ha sido parcheado en la versión 2.2.0."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "nezhahq",
          "product": "nezha",
          "versions": [
            {
              "version": ">= 1.0.0, < 2.2.0",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N",
          "baseScore": 6.8,
          "baseSeverity": "MEDIUM",
          "attackVector": "NETWORK",
          "attackComplexity": "HIGH",
          "privilegesRequired": "NONE",
          "userInteraction": "REQUIRED",
          "scope": "UNCHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "availabilityImpact": "NONE"
        },
        "exploitabilityScore": 1.6,
        "impactScore": 5.2
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-06-15T21:35:11.641888Z",
          "id": "CVE-2026-53523",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-601"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/nezhahq/nezha/security/advisories/GHSA-9rc6-8cjv-rcvx",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/nezhahq/nezha/security/advisories/GHSA-9rc6-8cjv-rcvx",
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"
    }
  ]
}