{"id":"CVE-2026-77259","revision":"bf1a2cf352c1442dab3a50010375b822","records":[{"revision":"bf1a2cf352c1442dab3a50010375b822","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-77259","aliases":[],"title":"MCP Atlassian: Arbitrary file read via confluence_upload_attachment allows exfiltration of server credentials","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.","state":0,"publishedAt":"2026-09-22T18:45:48.269+00:00","modifiedAt":"2026-09-26T00:04:12.132+00:00","affected":[{"ecosystem":"Vendor product","name":"mcp-atlassian","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"sooperset\",\n                    \"product\": \"mcp-atlassian\",\n                    \"versions\": [\n                        {\n                            \"version\": \"< 0.22.0\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N","score":7.7,"severity":"HIGH"}],"references":["https://github.com/sooperset/mcp-atlassian/security/advisories/GHSA-6cr4-ccf3-x7h4","https://github.com/sooperset/mcp-atlassian/pull/1448","https://github.com/sooperset/mcp-atlassian/commit/b041733473f95119dd539542a43c280737a8e460","https://github.com/sooperset/mcp-atlassian/releases/tag/v0.22.0"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-77259","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-77259","identifiers":["CVE-2026-77259"]},"retained":false,"historicalAffected":[]}],"coverage":[]}