{"action":"Upgrade mcp-atlassian to 0.22.0 or later.","affected":[{"fixed":"0.22.0","introduced":"0"}],"component":"mcp-atlassian","cve_ids":["CVE-2026-77266"],"ecosystem":"PyPI","epss":0.00442,"exploited":false,"fixed_versions":["0.22.0"],"ghsa_id":"GHSA-mfv2-4wvm-9pgp","id":"tcs_01M5KFR05X9PBYNXEC9391THGY","modified_at":"2026-10-01T17:55:39.363163041Z","published_at":"2026-09-22T20:35:06Z","references":["https://osv.dev/vulnerability/GHSA-mfv2-4wvm-9pgp","https://github.com/sooperset/mcp-atlassian/security/advisories/GHSA-mfv2-4wvm-9pgp","https://github.com/sooperset/mcp-atlassian/pull/1448","https://github.com/sooperset/mcp-atlassian/commit/b041733473f95119dd539542a43c280737a8e460","https://github.com/sooperset/mcp-atlassian","https://github.com/sooperset/mcp-atlassian/releases/tag/v0.22.0"],"severity":{"label":"medium","score":6.5},"sources":[{"source":"osv","source_id":"GHSA-mfv2-4wvm-9pgp","url":"https://osv.dev/vulnerability/GHSA-mfv2-4wvm-9pgp"}],"summary":"MCP Atlassian: Path traversal in upload_attachment allows arbitrary file read and exfiltration via MCP tool call"}