CVE-2026-87911

9.0 criticalEPSS 1.7%

Critical (9.0). EPSS 1.7% chance of exploitation in the next 30 days.

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.

Severity

CVSS 4.0

9.0 critical

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

CVSS 3.1

9.6 critical

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

EPSS: 1.7% chance of exploitation in the next 30 days; higher than 77% of CVEs (scores of 2026-10-31)
CWEs: CWE-78, CWE-184
Published: 2026-09-09
Modified: 2026-09-10
Record from: the NVD, synced 2026-10-19

References

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