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CVE-2026-77252

Estado: AnalizadaMedia (6.5)—

MCP Atlassian is a Model Context Protocol (MCP) server for Atlassian products (Confluence and Jira). Prior to 0.22.0, caller-supplied projects_filter and spaces_filter arguments can replace administrator-configured allowlists, and caller-provided project or space clauses can suppress the configured restriction. A caller can search projects or spaces outside the intended boundary when the configured Atlassian credentials can access them. The advisory traces the vulnerable input and processing flow through JIRA_PROJECTS_FILTER, CONFLUENCE_SPACES_FILTER, projects_filter, spaces_filter, SearchMixin.search_issues, and SearchMixin.search, which identify the affected entry points, controls, and code paths. This issue is fixed in version 0.22.0.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

AV:N/PR:L sin UI indica acceso remoto autenticado a servidor expuesto. Bypass de filtros de búsqueda permite enumerar/acceder a proyectos y espacios fuera del scope autorizado.

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Vulnerability ScanningUser Account ManagementThreat Intelligence ProgramPrivileged Account ManagementNetwork SegmentationDisable or Remove Feature or Program

Tecnologías afectadas (1)

Mcp-atlassian — MCP Atlassian

CWE

Referencias

JSON original (NVD)

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  "id": "CVE-2026-77252",
  "cveTags": [],
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          "role": "CISA Coordinator",
          "options": [
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              "exploitation": "none"
            },
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            },
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              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-09-22T18:58:40.449887Z"
        }
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          "integrityImpact": "NONE",
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          "privilegesRequired": "LOW",
          "confidentialityImpact": "HIGH"
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      "description": [
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      "lang": "en",
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    }
  ],
  "lastModified": "2026-09-25T17:39:10.690",
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}