{"action":"Upgrade mcp-atlassian to 0.22.0 or later.","affected":[{"fixed":"0.22.0","introduced":"0"}],"component":"mcp-atlassian","cve_ids":["CVE-2026-77272"],"ecosystem":"PyPI","epss":0.00262,"exploited":false,"fixed_versions":["0.22.0"],"ghsa_id":"GHSA-g2r2-3j32-j27x","id":"tcs_01M5KFGHAG50DWHJTT6MR8HG9S","modified_at":"2026-10-01T17:56:06.097977063Z","published_at":"2026-09-22T20:35:25Z","references":["https://osv.dev/vulnerability/GHSA-g2r2-3j32-j27x","https://github.com/sooperset/mcp-atlassian/security/advisories/GHSA-g2r2-3j32-j27x","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":5.4},"sources":[{"source":"osv","source_id":"GHSA-g2r2-3j32-j27x","url":"https://osv.dev/vulnerability/GHSA-g2r2-3j32-j27x"}],"summary":"MCP Atlassian: Reflected XSS in OAuth Setup Callback Handler"}