CVE-2026-73498

{
  "id": "CVE-2026-73498",
  "sourceIdentifier": "[email protected]",
  "published": "2026-08-12T22:17:16.973",
  "lastModified": "2026-10-24T15:10:00.190",
  "vulnStatus": "Deferred",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "MCP Atlassian is a Model Context Protocol (MCP) server for Atlassian products (Confluence and Jira). Prior to 0.22.0, confluence_upload_attachment passes its client-supplied file_path directly to open(file_path, \"rb\") in src/mcp_atlassian/confluence/attachments.py through _upload_attachment_direct() without calling validate_safe_path. An authenticated MCP client can read any file accessible to the server process and exfiltrate it to Confluence as an attachment. If an AI agent can be induced to call the tool through untrusted content, the same flaw can disclose server environment variables such as CONFLUENCE_API_TOKEN and other credentials. This issue is fixed in version 0.22.0."
    },
    {
      "lang": "es",
      "value": "MCP Atlassian es un servidor de Protocolo de Contexto de Modelo (MCP) para productos de Atlassian (Confluence y Jira). Antes de 0.22.0, confluence_upload_attachment pasa su file_path suministrado por el cliente directamente a open(file_path, ’rb’) en src/mcp_atlassian/confluence/attachments.py a través de _upload_attachment_direct() sin llamar a validate_safe_path. Un cliente MCP autenticado puede leer cualquier archivo accesible al proceso del servidor y exfiltrarlo a Confluence como un adjunto. Si un agente de IA puede ser inducido a llamar a la herramienta a través de contenido no confiable, la misma falla puede divulgar variables de entorno del servidor como CONFLUENCE_API_TOKEN y otras credenciales. Este problema está solucionado en la versión 0.22.0."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "sooperset",
          "product": "mcp-atlassian",
          "versions": [
            {
              "version": "< 0.22.0",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N",
          "baseScore": 7.7,
          "baseSeverity": "HIGH",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "LOW",
          "userInteraction": "NONE",
          "scope": "CHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "availabilityImpact": "NONE"
        },
        "exploitabilityScore": 3.1,
        "impactScore": 4.0
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-08-13T13:36:45.550525Z",
          "id": "CVE-2026-73498",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-22"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/sooperset/mcp-atlassian/commit/b041733473f95119dd539542a43c280737a8e460",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/sooperset/mcp-atlassian/pull/1448",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/sooperset/mcp-atlassian/releases/tag/v0.22.0",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/sooperset/mcp-atlassian/security/advisories/GHSA-g5r6-gv6m-f5jv",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/sooperset/mcp-atlassian/security/advisories/GHSA-g5r6-gv6m-f5jv",
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"
    }
  ]
}