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Findings

CVE-2026-27825

MCP Atlassian is a Model Context Protocol (MCP) server for Atlassian products (Confluence and Jira).

Published Mar 10, 2026 · updated Jun 17, 2026 · mcp-atlassian mcp atlassian

MCP Atlassian is a Model Context Protocol (MCP) server for Atlassian products (Confluence and Jira). Prior to version 0.17.0, the MCP tool accepts a parameter that is written to without any directory boundary enforcement. An attacker who can call this tool and supply or access a Confluence attachment with malicious content can write arbitrary content to any path the server process has write access to. Because the attacker controls both the write destination and the written content (via an uploaded Confluence attachment), this constitutes for arbitrary code execution (for example, writing a valid cron entry to achieves code execution within one scheduler cycle with no server restart required). Version 0.17.0 fixes the issue.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Mar 10, 2026 · NIST NVD

    Detected

    MCP Atlassian is a Model Context Protocol (MCP) server for Atlassian products (Confluence and Jira). Prior to version 0.17.0, the MCP tool accepts a parameter that is written to without any directory boundary enforcement. An attacker who can call this tool and supply or access a Confluence attachment with malicious content can write arbitrary content to any path the server process has write access

  2. Jun 17, 2026 · NIST NVD

    Updated

    MCP Atlassian is a Model Context Protocol (MCP) server for Atlassian products (Confluence and Jira). Prior to version 0.17.0, the MCP tool accepts a parameter that is written to without any directory boundary enforcement. An attacker who can call this tool and supply or access a Confluence attachment with malicious content can write arbitrary content to any path the server process has write access

Affected

  • cpe mcp-atlassian/mcp atlassianversion unspecified

Sources

  • CVE.orgVulnerability recordCVE-2026-27825

    Official CVE identifier

    cve.org
  • NIST NVDVulnerability recordCVE-2026-27825

    MCP Atlassian is a Model Context Protocol (MCP) server for Atlassian products (Confluence and Jira). Prior to version 0.17.0, the MCP tool accepts a parameter that is written to without any directory boundary enforcement. An attack

    nvd.nist.gov

References