CVE-2026-125320

MEDIUM 5.3

pgEdge Postgres MCP Server did not validate the Origin header, allowing DNS rebinding

CVSS Score

5.3

EPSS Score

0.0%

EPSS Percentile

0th

pgEdge Postgres MCP Server enables SQL queries against PostgreSQL databases through Model Context Protocol compatible clients. Prior to 1.1.0, the HTTP transport did not validate the Origin header on incoming requests. A user who visited an attacker-controlled page could be targeted through DNS rebinding, allowing the page to reach a locally running server and read schemas and query results from configured databases. The issue affected deployments with the HTTP transport enabled on a machine that also ran a browser, while the default stdio transport was not reachable through this path. This issue is fixed in version 1.1.0.

CWE	CWE-346
Vendor	pgedge
Product	pgedge-postgres-mcp
Published	Nov 10, 2026

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CVSS v3 Breakdown

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

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Affected Versions

pgEdge / pgedge-postgres-mcp

< 1.1.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/pgEdge/pgedge-postgres-mcp/security/advisories/GHSA-6hg5-9f3w-c886 github.com: https://github.com/pgEdge/pgedge-postgres-mcp/issues/231 github.com: https://github.com/pgEdge/pgedge-postgres-mcp/pull/232 github.com: https://github.com/pgEdge/pgedge-postgres-mcp/commit/5571bd492a803e8f8831599c88b4619c5041fd8e github.com: https://github.com/pgEdge/pgedge-postgres-mcp/releases/tag/v1.1.0