FKIE_CVE-2026-31882

Vulnerability from fkie_nvd - Published: 2026-03-13 19:54 - Updated: 2026-03-18 20:14
Severity ?
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Summary
Dagu is a workflow engine with a built-in Web user interface. Prior to 2.2.4, when Dagu is configured with HTTP Basic authentication (DAGU_AUTH_MODE=basic), all Server-Sent Events (SSE) endpoints are accessible without any credentials. This allows unauthenticated attackers to access real-time DAG execution data, workflow configurations, execution logs, and queue status — bypassing the authentication that protects the REST API. The buildStreamAuthOptions() function builds authentication options for SSE/streaming endpoints. When the auth mode is basic, it returns an auth.Options struct with BasicAuthEnabled: true but AuthRequired defaults to false (Go zero value). The authentication middleware at internal/service/frontend/auth/middleware.go allows unauthenticated requests when AuthRequired is false. This vulnerability is fixed in 2.2.4.
References
security-advisories@github.comhttps://github.com/dagu-org/dagu/commit/064616c9b80c04824c1c7c357308f77f3f24d775Patch
security-advisories@github.comhttps://github.com/dagu-org/dagu/pull/1752Issue Tracking, Patch
security-advisories@github.comhttps://github.com/dagu-org/dagu/releases/tag/v2.2.4Product, Release Notes
security-advisories@github.comhttps://github.com/dagu-org/dagu/security/advisories/GHSA-9wmw-9wph-2vwpExploit, Mitigation, Vendor Advisory
Impacted products
Vendor Product Version
dagu dagu *
To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:dagu:dagu:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "681DF7E8-8500-4F63-8E04-FC8AB4CAFD3A",
              "versionEndExcluding": "2.2.4",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Dagu is a workflow engine with a built-in Web user interface. Prior to 2.2.4, when Dagu is configured with HTTP Basic authentication (DAGU_AUTH_MODE=basic), all Server-Sent Events (SSE) endpoints are accessible without any credentials. This allows unauthenticated attackers to access real-time DAG execution data, workflow configurations, execution logs, and queue status \u2014 bypassing the authentication that protects the REST API. The buildStreamAuthOptions() function builds authentication options for SSE/streaming endpoints. When the auth mode is basic, it returns an auth.Options struct with BasicAuthEnabled: true but AuthRequired defaults to false (Go zero value). The authentication middleware at internal/service/frontend/auth/middleware.go allows unauthenticated requests when AuthRequired is false. This vulnerability is fixed in 2.2.4."
    },
    {
      "lang": "es",
      "value": "Dagu es un motor de flujo de trabajo con una interfaz de usuario web integrada. Antes de la versi\u00f3n 2.2.4, cuando Dagu est\u00e1 configurado con autenticaci\u00f3n HTTP b\u00e1sica (DAGU_AUTH_MODE=basic), todos los puntos finales de Server-Sent Events (SSE) son accesibles sin ninguna credencial. Esto permite a atacantes no autenticados acceder a datos de ejecuci\u00f3n de DAG en tiempo real, configuraciones de flujo de trabajo, registros de ejecuci\u00f3n y estado de la cola \u2014 eludiendo la autenticaci\u00f3n que protege la API REST. La funci\u00f3n buildStreamAuthOptions() construye opciones de autenticaci\u00f3n para puntos finales SSE/streaming. Cuando el modo de autenticaci\u00f3n es b\u00e1sico, devuelve una estructura auth.Options con BasicAuthEnabled: true pero AuthRequired por defecto es false (valor cero de Go). El middleware de autenticaci\u00f3n en internal/service/frontend/auth/middleware.go permite solicitudes no autenticadas cuando AuthRequired es false. Esta vulnerabilidad se corrige en la versi\u00f3n 2.2.4."
    }
  ],
  "id": "CVE-2026-31882",
  "lastModified": "2026-03-18T20:14:20.940",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-03-13T19:54:37.000",
  "references": [
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Patch"
      ],
      "url": "https://github.com/dagu-org/dagu/commit/064616c9b80c04824c1c7c357308f77f3f24d775"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Issue Tracking",
        "Patch"
      ],
      "url": "https://github.com/dagu-org/dagu/pull/1752"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Product",
        "Release Notes"
      ],
      "url": "https://github.com/dagu-org/dagu/releases/tag/v2.2.4"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
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        "Mitigation",
        "Vendor Advisory"
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      "url": "https://github.com/dagu-org/dagu/security/advisories/GHSA-9wmw-9wph-2vwp"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-306"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Primary"
    }
  ]
}


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