{"id":"CVE-2026-77267","revision":"b92e850d9e9b45ff96e8cd31a1e6eb08","records":[{"revision":"b92e850d9e9b45ff96e8cd31a1e6eb08","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-77267","aliases":[],"title":"mcp-atlassian has an incomplete SSRF remediation","description":"MCP Atlassian is a Model Context Protocol (MCP) server for Atlassian products (Confluence and Jira). Prior to 0.22.0, the X-Atlassian-Jira-Url and X-Atlassian-Confluence-Url headers are processed by _process_authentication_headers and used to construct Atlassian fetchers without calling validate_url_for_ssrf. A caller who can set these headers can supply an internal or metadata-service URL and cause the server to send requests to that destination, bypassing the incomplete CVE-2026-27826 remediation. This issue is fixed in version 0.22.0.","state":0,"publishedAt":"2026-09-22T17:52:25.73+00:00","modifiedAt":"2026-09-28T17:18:50.679+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 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N","score":8.3,"severity":"HIGH"}],"references":["https://github.com/sooperset/mcp-atlassian/security/advisories/GHSA-5wf4-jqxh-8gm3","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-2026-77267","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-77267","identifiers":["CVE-2026-77267"]},"retained":false,"historicalAffected":[]}],"coverage":[]}