{"action":"Upgrade mcp-atlassian to 0.22.0 or later.","affected":[{"fixed":"0.22.0","introduced":"0"}],"component":"mcp-atlassian","cve_ids":["CVE-2026-77250"],"ecosystem":"PyPI","epss":0.00115,"exploited":false,"fixed_versions":["0.22.0"],"ghsa_id":"GHSA-g5xv-mhgm-v5f6","id":"tcs_01M5KH9VCKS94K0NZYRNFPW2PH","modified_at":"2026-10-01T17:45:10.034044556Z","published_at":"2026-10-01T16:38:36.503532Z","references":["https://osv.dev/vulnerability/PYSEC-2026-4094","https://github.com/sooperset/mcp-atlassian/security/advisories/GHSA-g5xv-mhgm-v5f6","https://nvd.nist.gov/vuln/detail/CVE-2026-77250","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","https://pypi.org/project/mcp-atlassian","https://github.com/advisories/GHSA-g5xv-mhgm-v5f6"],"severity":{"label":"medium","score":6.1},"sources":[{"source":"osv","source_id":"PYSEC-2026-4094","url":"https://osv.dev/vulnerability/PYSEC-2026-4094"}],"summary":"MCP Atlassian: OAuth fallback token storage writes plaintext access and refresh tokens with group-readable permissions"}