{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-87911", "assignerOrgId": "ff89ba41-3aa1-4d27-914a-91399e9639e5", "state": "PUBLISHED", "assignerShortName": "AMZN", "dateReserved": "2026-09-09T15:23:09.508Z", "datePublished": "2026-09-09T19:35:46.136Z", "dateUpdated": "2026-09-10T13:53:27.245Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "ff89ba41-3aa1-4d27-914a-91399e9639e5", "shortName": "AMZN", "dateUpdated": "2026-09-09T19:37:17.985Z" }, "title": "Read-only enforcement bypass enabling operating system command execution in the SQL validation component of Amazon awslabs postgres-mcp-server", "problemTypes": [ { "descriptions": [ { "lang": "en", "cweId": "CWE-78", "description": "CWE-78 Improper neutralization of special elements used in an OS command ('OS command injection')", "type": "CWE" } ] }, { "descriptions": [ { "lang": "en", "cweId": "CWE-184", "description": "CWE-184 Incomplete list of disallowed inputs", "type": "CWE" } ] } ], "impacts": [ { "capecId": "CAPEC-248", "descriptions": [ { "lang": "en", "value": "CAPEC-248 Command Injection" } ] }, { "capecId": "CAPEC-153", "descriptions": [ { "lang": "en", "value": "CAPEC-153 Input Data Manipulation" } ] } ], "affected": [ { "vendor": "AWS", "product": "AWS Labs postgres MCP Server", "versions": [ { "status": "affected", "version": "0", "lessThan": "1.1.7", "versionType": "custom" } ], "defaultStatus": "unaffected" } ], "cpeApplicability": [ { "operator": "OR", "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:a:aws:aws_labs_postgres_mcp_server:*:*:*:*:*:*:*:*", "versionStartIncluding": "0", "versionEndExcluding": "1.1.7" } ] } ] } ], "descriptions": [ { "lang": "en", "value": "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.", "supportingMedia": [ { "type": "text/html", "base64": false, "value": "

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.

To remediate this issue, users should upgrade to version 1.1.7 or later.

" } ] } ], "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" ] } ], "metrics": [ { "format": "CVSS", "scenarios": [ { "lang": "en", "value": "GENERAL" } ], "cvssV3_1": { "version": "3.1", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "CHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH", "baseSeverity": "CRITICAL", "baseScore": 9.6, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H" } }, { "format": "CVSS", "scenarios": [ { "lang": "en", "value": "GENERAL" } ], "cvssV4_0": { "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "NONE", "userInteraction": "PASSIVE", "vulnConfidentialityImpact": "HIGH", "subConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "subIntegrityImpact": "HIGH", "vulnAvailabilityImpact": "HIGH", "subAvailabilityImpact": "HIGH", "exploitMaturity": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "version": "4.0", "baseSeverity": "CRITICAL", "baseScore": 9, "vectorString": "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" } } ], "credits": [ { "lang": "en", "value": "Corsen AI", "type": "finder" } ], "source": { "discovery": "UNKNOWN" }, "x_generator": { "engine": "Vulnogram 1.0.5" } }, "adp": [ { "metrics": [ { "other": { "type": "ssvc", "content": { "timestamp": "2026-09-10T13:53:17.650302Z", "id": "CVE-2026-87911", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "total" } ], "role": "CISA Coordinator", "version": "2.0.3" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-09-10T13:53:27.245Z" } } ] } }