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      <title>CVE-2026-77259 — MCP Atlassian: Arbitrary file read via confluence_upload_attachment allows exfiltration of server credentials</title>
      <link>https://vulnerability.circl.lu/vuln/cve-2026-77259</link>
      <description>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; sooperset mcp-atlassian&lt;/p&gt;
&lt;p&gt;MCP Atlassian is a Model Context Protocol (MCP) server for Atlassian products (Confluence and Jira). Prior to 0.22.0, confluence_upload_attachment opens a caller-selected server-local file without checking that the resolved path remains in the workspace. A caller can upload environment files, credentials, or other readable host data to a Confluence page and retrieve it through Atlassian. The advisory traces the vulnerable input and processing flow through confluence_upload_attachment, file_path, and open(file_path, &amp;#34;rb&amp;#34;), which identify the affected entry points, controls, and code paths. This issue is fixed in version 0.22.0.&lt;/p&gt;</description>
      <content:encoded>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; sooperset mcp-atlassian&lt;/p&gt;
&lt;p&gt;MCP Atlassian is a Model Context Protocol (MCP) server for Atlassian products (Confluence and Jira). Prior to 0.22.0, confluence_upload_attachment opens a caller-selected server-local file without checking that the resolved path remains in the workspace. A caller can upload environment files, credentials, or other readable host data to a Confluence page and retrieve it through Atlassian. The advisory traces the vulnerable input and processing flow through confluence_upload_attachment, file_path, and open(file_path, &amp;#34;rb&amp;#34;), which identify the affected entry points, controls, and code paths. This issue is fixed in version 0.22.0.&lt;/p&gt;</content:encoded>
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