{"id":"CVE-2026-87911","aliases":["EUVD-2026-75127"],"status":"published","title":"Read-only enforcement bypass enabling operating system command execution in the SQL validation component of Amazon awslabs postgres-mcp-server","description":"An OS command injection weakness in the read-only enforcement of the SQL validation component in Amazon awslabs postgres-mcp-server before 1.1.7 might allow an unauthenticated actor to execute operating system commands on the host of a self-managed PostgreSQL server by placing a crafted COPY ... TO PROGRAM statement into content that is processed when an authenticated user interacts with the MCP server in its default read-only mode.\n\n\n\nTo remediate this issue, users should upgrade to version 1.1.7 or later.","severity":{"version":"4.0","score":9,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H","level":"critical","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.01738,"percentile":0.78004,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-184","CWE-78"],"published":"2026-09-09T19:35:46Z","modified":"2026-09-10T15:53:23Z","products":[{"vendor":"aws","product":"aws labs postgres mcp server"}],"references":[{"url":"https://pypi.org/project/awslabs.postgres-mcp-server/1.1.7/","tags":["patch"]},{"url":"https://aws.amazon.com/security/security-bulletins/2026-104-aws/","tags":["vendor-advisory"]},{"url":"https://github.com/awslabs/mcp/security/advisories/GHSA-fph8-pg5w-78fv","tags":["third-party-advisory"]}],"sources":{"cve":[{"id":"CVE-2026-87911","title":"Read-only enforcement bypass enabling operating system command execution in the SQL validation component of Amazon awslabs postgres-mcp-server","description":"An OS command injection weakness in the read-only enforcement of the SQL validation component in Amazon awslabs postgres-mcp-server before 1.1.7 might allow an unauthenticated actor to execute operating system commands on the host of a self-managed PostgreSQL server by placing a crafted COPY ... TO PROGRAM statement into content that is processed when an authenticated user interacts with the MCP server in its default read-only mode.\n\n\n\nTo remediate this issue, users should upgrade to version 1.1.7 or later.","status":"published","published":"2026-09-09T19:35:46.136Z","modified":"2026-09-10T13:53:27.245Z","cvss":[{"version":"4.0","score":9,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H","level":"critical","assessor":"cna"},{"version":"3.1","score":9.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H","level":"critical","assessor":"cna"}],"cwes":["CWE-78","CWE-184"],"updated_at":"2026-11-02T13:37:58.613221Z"}],"euvd":[{"id":"EUVD-2026-75127","description":"An OS command injection weakness in the read-only enforcement of the SQL validation component in Amazon awslabs postgres-mcp-server before 1.1.7 might allow an unauthenticated actor to execute operating system commands on the host of a self-managed PostgreSQL server by placing a crafted COPY ... TO PROGRAM statement into content that is processed when an authenticated user interacts with the MCP server in its default read-only mode.\n\n\n\nTo remediate this issue, users should upgrade to version 1.1.7 or later.","status":"published","published":"2026-09-09T19:35:46Z","modified":"2026-09-10T13:53:27Z","cvss":[{"version":"4.0","score":9,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H","level":"critical"}],"updated_at":"2026-11-02T17:28:25.275283Z"}],"nvd":[{"id":"CVE-2026-87911","description":"An OS command injection weakness in the read-only enforcement of the SQL validation component in Amazon awslabs postgres-mcp-server before 1.1.7 might allow an unauthenticated actor to execute operating system commands on the host of a self-managed PostgreSQL server by placing a crafted COPY ... TO PROGRAM statement into content that is processed when an authenticated user interacts with the MCP server in its default read-only mode.\n\n\n\nTo remediate this issue, users should upgrade to version 1.1.7 or later.","status":"published","published":"2026-09-09T20:21:02.017Z","modified":"2026-09-10T15:53:23.707Z","cvss":[{"version":"4.0","score":9,"vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"critical","assessor":"secondary"},{"version":"3.1","score":9.6,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H","level":"critical","assessor":"secondary"}],"cwes":["CWE-78","CWE-184"],"updated_at":"2026-11-02T14:12:45.93749Z"}]}}