{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "12c2e5395bd9331d49ca103593edfd0db39c4f38"
            }
          ],
          "repo": "https://github.com/dagu-org/dagu",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-9wmw-9wph-2vwp"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-306"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31882.json"
  },
  "details": "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.",
  "id": "CVE-2026-31882",
  "modified": "2026-04-01T23:10:38.294108581Z",
  "published": "2026-03-13T19:28:25.615Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/dagu-org/dagu/releases/tag/v2.2.4"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/31xxx/CVE-2026-31882.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/dagu-org/dagu/security/advisories/GHSA-9wmw-9wph-2vwp"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-31882"
    },
    {
      "type": "FIX",
      "url": "https://github.com/dagu-org/dagu/commit/064616c9b80c04824c1c7c357308f77f3f24d775"
    },
    {
      "type": "FIX",
      "url": "https://github.com/dagu-org/dagu/pull/1752"
    }
  ],
  "schema_version": "1.7.3",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Dagu SSE Authentication Bypass in Basic Auth Mode"
}