Directory Traversal Affecting mcp-atlassian package, versions <0.22.1-r0
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-CHAINGUARDLATEST-MCPATLASSIAN-18760707
- published14 Aug 2026
- disclosed12 Aug 2026
Introduced: 12 Aug 2026
CVE-2026-73498 (opens in a new tab)How to fix?
Upgrade Chainguard mcp-atlassian to version 0.22.1-r0 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream mcp-atlassian package and not the mcp-atlassian package as distributed by Chainguard.
See How to fix? for Chainguard relevant fixed versions and status.
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.