PYSEC-2026-408 MCP Atlassian has an arbitrary file write leading to arbitrary code execution via unconstrained download_path in confluence_download_attachment

Summary The confluencedownloadattachment MCP tool accepts a downloadpath 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 serv...

CVE-2026-27825

The CVE-2026-27825 entry describes an arbitrary file write in MCP Atlassian’s MCP server for Confluence/Jira. Before version 0.17.0, the confluence_download_attachment tool accepts a download_path without directory boundary enforcement, allowing an attacker who can call the tool and provide a Con...