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, "rb"), which identify the affected entry points, controls, and code paths. This issue is fixed in version 0.22.0.
Metrics
Affected Vendors & Products
References
History
Tue, 29 Sep 2026 13:15:00 +0000
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Mcp-atlassian
Mcp-atlassian mcp Atlassian |
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| CPEs | cpe:2.3:a:mcp-atlassian:mcp_atlassian:*:*:*:*:*:*:*:* | |
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Mcp-atlassian
Mcp-atlassian mcp Atlassian |
Sat, 26 Sep 2026 00:30:00 +0000
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ssvc
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Tue, 22 Sep 2026 21:45:00 +0000
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Sooperset
Sooperset mcp-atlassian |
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Sooperset
Sooperset mcp-atlassian |
Tue, 22 Sep 2026 19:00:00 +0000
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| Description | 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, "rb"), which identify the affected entry points, controls, and code paths. This issue is fixed in version 0.22.0. | |
| Title | MCP Atlassian: Arbitrary file read via confluence_upload_attachment allows exfiltration of server credentials | |
| Weaknesses | CWE-22 CWE-552 |
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| References |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: GitHub_M
Published: 2026-09-22T18:45:48.269Z
Updated: 2026-09-26T00:04:12.132Z
Reserved: 2026-08-20T19:02:23.417Z
Link: CVE-2026-77259
Updated: 2026-09-26T00:04:07.497Z
Status : Analyzed
Published: 2026-09-22T19:16:50.327
Modified: 2026-09-29T13:03:37.970
Link: CVE-2026-77259
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