{"action":"Upgrade awslabs-aws-api-mcp-server to 1.3.9 or later.","affected":[{"fixed":"1.3.9","introduced":"0.2.14"}],"component":"awslabs-aws-api-mcp-server","cve_ids":["CVE-2026-4270"],"ecosystem":"PyPI","epss":0.00133,"exploited":false,"fixed_versions":["1.3.9"],"ghsa_id":"GHSA-2cpp-j2fc-qhp7","id":"tcs_01M5KGTPATB3KT1FYT7GX06E69","modified_at":"2026-06-10T17:00:36.402824571Z","published_at":"2026-03-16T17:16:32.270Z","references":["https://osv.dev/vulnerability/PYSEC-2026-162","https://aws.amazon.com/security/security-bulletins/2026-007-AWS/","https://pypi.org/project/awslabs.aws-api-mcp-server/1.3.9/","https://github.com/advisories/GHSA-2cpp-j2fc-qhp7"],"severity":{"label":"unknown"},"sources":[{"source":"osv","source_id":"PYSEC-2026-162","url":"https://osv.dev/vulnerability/PYSEC-2026-162"}],"summary":"Improper Protection of Alternate Path exists in the no-access and workdir feature of the AWS API MCP Server versions >= 0.2.14 and < 1.3.9 on all platforms may allow the bypass of intended file access"}