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Back to active CVEs
Critical · CVSS 9.6CVE-2026-87911

Read-only enforcement bypass enabling operating system command execution in the SQL validation component of Amazon awslabs postgres-mcp-serverCVE-2026-87911

Answer in brief

CVE-2026-87911 records a Critical severity (CVSS 9.6) vulnerability in Read-only enforcement bypass enabling operating system command execution in the SQL validation component of Amazon awslabs postgres-mcp-server. The current sources do not mark it as known exploited. The current feed maps AWS/AWS Labs postgres MCP Server (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 9, 2026Updated Sep 10, 2026Source checked Oct 25, 2026First seen by HOL Sep 9, 2026Material review Sep 10, 2026
Upstream Advisory

Key facts

Risk
Critical · CVSS 9.6
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Available

Why this deserves its current priority

CVSS is 9.6. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps AWS/AWS Labs postgres MCP Server (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
AWS/AWS Labs postgres MCP Servergeneric>=0 <1.1.71.1.7

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for AWS/AWS Labs postgres MCP Server.
  2. 2Review the reported fix. Update AWS/AWS Labs postgres MCP Server to 1.1.7 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Sep 9, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Sep 10, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Sep 9, 2026

Sources and claim methodology

  • Source referenceaws.amazon.com
  • GitHub security advisorygithub.com
  • Source referencepypi.org
Upstream source 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. To remediate this issue, users should upgrade to version 1.1.7 or later.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • Unitree Robotics Unitree Go2 chat_go gpt_thread.py set_volume os command injectionAlso CWE-78

Record context

Vulnerability class
Command Injection
EPSS
Not reported
CWE IDs
CWE-78, CWE-184
Source
CVE List V5
Source checked
Oct 25, 2026
References
3 linked sources
Open source record