CVE-2026-18954

Medium

Description

Incorrect authorization in the aggregation pipeline tool in Amazon AWS Labs DocumentDB MCP Server before 1.0.12 might allow an authenticated MCP client to perform inappropriate write operations on the connected database via write-capable aggregation pipeline stages that bypass the read-only mode enforcement logic. To remediate this issue, users should upgrade to version 1.0.12 or later.

SeverityMedium

CVSS5.5

Exploit probability—

ProductAmazon Documentdb Mcp Server

PublishedAug 5, 2026

First seenAug 5, 2026

Weakness typeCWE-863Incorrect authorization

How to fix

Update

amazon documentdb_mcp_server1.0.12 or later

Patches

github.com/awslabs/mcp/releases/tag/2026.04.20260408085348

Vendor advisories

Affected products

Product	Affected versions	Fixed in
amazon documentdb_mcp_server	v < 1.0.12	1.0.12

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