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  4. CVE 2026 126196 pgedge postgres mcp server read only mode can be
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Back to active CVEs
High · CVSS 8.1CVE-2026-126196

pgEdge Postgres MCP Server read-only mode can be bypassed by SQL statement smuggling through query_databaseCVE-2026-126196

Answer in brief

CVE-2026-126196 records a High severity (CVSS 8.1) vulnerability in pgEdge Postgres MCP Server read-only mode can be bypassed by SQL statement smuggling through query_database. The current sources do not mark it as known exploited. The current feed maps pgEdge/pgedge-postgres-mcp (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 Nov 12, 2026Updated Nov 12, 2026Source checked Nov 12, 2026First seen by HOL Nov 12, 2026Material review Nov 12, 2026
Upstream Advisory

Key facts

Risk
High · CVSS 8.1
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Available

Why this deserves its current priority

CVSS is 8.1. 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 pgEdge/pgedge-postgres-mcp (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
pgEdge/pgedge-postgres-mcpgeneric<1.1.01.1.0

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for pgEdge/pgedge-postgres-mcp.
  2. 2Review the reported fix. Update pgEdge/pgedge-postgres-mcp to 1.1.0 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Nov 12, 2026

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

  2. Source modified

    Nov 12, 2026

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

  3. First seen by HOL

    Nov 12, 2026

Sources and claim methodology

  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
Upstream source description

pgEdge Postgres MCP Server enables SQL queries against PostgreSQL databases through Model Context Protocol compatible clients. Prior to 1.1.0, query_database on a read_only connection could send unrecognized statements through pgx Exec without bind parameters, selecting PostgreSQL's simple query protocol and allowing multiple semicolon-separated statements in one request. A caller could combine transaction or session state changes with database writes, and pooled session state could leave later calls writable, when the connecting role held write privileges. The flaw affected deployments relying on read_only as a safety boundary, could compromise integrity and availability, and did not add confidentiality impact beyond the reads already permitted by the connection. This issue is fixed in 1.1.0.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • pgEdge Postgres MCP Server SQL injection through custom pl-do tool parametersSame pgedge/pgedge-postgres-mcp package
  • pgEdge Postgres MCP Server custom tools performed writes without user confirmationSame pgedge/pgedge-postgres-mcp package
  • pgEdge Postgres MCP Server write confirmation skipped for writes that begin with a reading keywordSame pgedge/pgedge-postgres-mcp package

Record context

Vulnerability class
SQL Injection
EPSS
Not reported
CWE IDs
CWE-89, CWE-693
Source
CVE List V5
Source checked
Nov 12, 2026
References
4 linked sources
Open source record