CVE-2026-73498: CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') in sooperset mcp-atlassian
CVE-2026-73498 is a path traversal vulnerability in sooperset mcp-atlassian prior to version 0.22.0. It allows an authenticated MCP client to read arbitrary files accessible to the server process by supplying a crafted file path. This can lead to exfiltration of sensitive files as Confluence attachments, including environment variables and credentials if exploited via an AI agent. The issue is fixed in version 0.22.0.
AI Analysis
Technical Summary
The vulnerability exists in the confluence_upload_attachment function of sooperset mcp-atlassian before version 0.22.0. The function passes a client-supplied file_path directly to open() without validating the path, enabling path traversal (CWE-22). An authenticated MCP client can exploit this to read any file accessible by the server and upload it as a Confluence attachment. This can disclose sensitive information such as CONFLUENCE_API_TOKEN and other credentials. The flaw is resolved in version 0.22.0.
Potential Impact
An attacker with authenticated MCP client access can read arbitrary files on the server, potentially exposing sensitive environment variables and credentials. This can lead to unauthorized disclosure of confidential information. The vulnerability does not affect integrity or availability directly but has a high confidentiality impact.
Mitigation Recommendations
Upgrade to sooperset mcp-atlassian version 0.22.0 or later where this vulnerability is fixed. Prior versions are vulnerable due to lack of path validation in file upload functionality. No other mitigations are specified.
CVE-2026-73498: CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') in sooperset mcp-atlassian
Description
CVE-2026-73498 is a path traversal vulnerability in sooperset mcp-atlassian prior to version 0.22.0. It allows an authenticated MCP client to read arbitrary files accessible to the server process by supplying a crafted file path. This can lead to exfiltration of sensitive files as Confluence attachments, including environment variables and credentials if exploited via an AI agent. The issue is fixed in version 0.22.0.
CVSS v3.1
Score 7.7high
Affected software
pkg:github/sooperset/mcp-atlassianRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability exists in the confluence_upload_attachment function of sooperset mcp-atlassian before version 0.22.0. The function passes a client-supplied file_path directly to open() without validating the path, enabling path traversal (CWE-22). An authenticated MCP client can exploit this to read any file accessible by the server and upload it as a Confluence attachment. This can disclose sensitive information such as CONFLUENCE_API_TOKEN and other credentials. The flaw is resolved in version 0.22.0.
Potential Impact
An attacker with authenticated MCP client access can read arbitrary files on the server, potentially exposing sensitive environment variables and credentials. This can lead to unauthorized disclosure of confidential information. The vulnerability does not affect integrity or availability directly but has a high confidentiality impact.
Mitigation Recommendations
Upgrade to sooperset mcp-atlassian version 0.22.0 or later where this vulnerability is fixed. Prior versions are vulnerable due to lack of path validation in file upload functionality. No other mitigations are specified.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-08-12T19:00:33.736Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a7ce514bf8831d5392fb5ed
Added to database: 08/12/2026, 21:26:44 UTC
Last enriched: 08/12/2026, 21:41:13 UTC
Last updated: 08/12/2026, 21:58:51 UTC
Views: 4
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