{"action":"Upgrade awslabs-aws-api-mcp-server to 1.3.9 or later.","affected":[{"fixed":"1.3.9","introduced":"0.2.14"},{"fixed":"1.3.9","introduced":"0.2.14"}],"component":"awslabs-aws-api-mcp-server","cve_ids":["CVE-2026-4270"],"ecosystem":"PyPI","epss":0.00188,"exploited":false,"fixed_versions":["1.3.9"],"ghsa_id":"GHSA-2cpp-j2fc-qhp7","id":"tcs_01M5KESDV232ATAZMB892WZKK7","modified_at":"2026-06-08T23:30:20.315711802Z","published_at":"2026-03-17T20:33:15Z","references":["https://osv.dev/vulnerability/GHSA-2cpp-j2fc-qhp7","https://github.com/awslabs/mcp/security/advisories/GHSA-2cpp-j2fc-qhp7","https://nvd.nist.gov/vuln/detail/CVE-2026-4270","https://aws.amazon.com/security/security-bulletins/2026-007-AWS","https://github.com/awslabs/mcp","https://github.com/pypa/advisory-database/tree/main/vulns/awslabs-aws-api-mcp-server/PYSEC-2026-162.yaml","https://pypi.org/project/awslabs.aws-api-mcp-server/1.3.9"],"severity":{"label":"medium","score":5.5},"sources":[{"source":"osv","source_id":"GHSA-2cpp-j2fc-qhp7","url":"https://osv.dev/vulnerability/GHSA-2cpp-j2fc-qhp7"}],"summary":"AWS API MCP File Access Restriction Bypass"}