CVE-2026-18954: CWE-863: Incorrect Authorization in AWS documentdb-mcp-server
Bulletin ID: 2026-076-AWS Scope: AWS Content Type: Important (requires attention) Publication Date: 08/05/2026 13:00 PM PDT Description: Amazon DocumentDB MCP Server is an open-source Model Context Protocol (MCP) server that enables AI assistants to interact with Amazon DocumentDB databases. We identified CVE-2026-18954, an incorrect authorization issue where write-capable aggregation pipeline stages ($out, $merge) bypass the read-only mode enforcement logic, potentially allowing an authenticated MCP client to perform write operations on the connected database. Impacted versions: < 1.0.12 Please refer to the article below for the most up-to-date and complete information related to this AWS Security Bulletin.
AI Analysis
Technical Summary
This vulnerability (CWE-863) in AWS DocumentDB MCP Server prior to version 1.0.12 involves improper authorization checks in the aggregation pipeline tool. An authenticated MCP client can exploit write-capable aggregation pipeline stages to perform unauthorized write operations on the connected database, circumventing the intended read-only mode enforcement. The issue is resolved by upgrading to version 1.0.12 or later.
Potential Impact
The vulnerability allows an authenticated MCP client with limited privileges to escalate their permissions and perform unauthorized write operations on the database. This can lead to integrity issues in the database data. There is no impact on confidentiality or availability reported. No known exploits are currently observed in the wild.
Mitigation Recommendations
AWS manages remediation for this cloud-hosted service. Users should upgrade to AWS DocumentDB MCP Server version 1.0.12 or later to remediate this vulnerability. Check the AWS security bulletin at https://aws.amazon.com/security/security-bulletins/2026-076-aws/ for the latest guidance and confirmation of patch status.
CVE-2026-18954: CWE-863: Incorrect Authorization in AWS documentdb-mcp-server
Description
Bulletin ID: 2026-076-AWS Scope: AWS Content Type: Important (requires attention) Publication Date: 08/05/2026 13:00 PM PDT Description: Amazon DocumentDB MCP Server is an open-source Model Context Protocol (MCP) server that enables AI assistants to interact with Amazon DocumentDB databases. We identified CVE-2026-18954, an incorrect authorization issue where write-capable aggregation pipeline stages ($out, $merge) bypass the read-only mode enforcement logic, potentially allowing an authenticated MCP client to perform write operations on the connected database. Impacted versions: < 1.0.12 Please refer to the article below for the most up-to-date and complete information related to this AWS Security Bulletin.
CVSS v3.1
Score 5.5medium
Affected software
pkg:github/awslabs/documentdb-mcp-serverRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CWE-863) in AWS DocumentDB MCP Server prior to version 1.0.12 involves improper authorization checks in the aggregation pipeline tool. An authenticated MCP client can exploit write-capable aggregation pipeline stages to perform unauthorized write operations on the connected database, circumventing the intended read-only mode enforcement. The issue is resolved by upgrading to version 1.0.12 or later.
Potential Impact
The vulnerability allows an authenticated MCP client with limited privileges to escalate their permissions and perform unauthorized write operations on the database. This can lead to integrity issues in the database data. There is no impact on confidentiality or availability reported. No known exploits are currently observed in the wild.
Mitigation Recommendations
AWS manages remediation for this cloud-hosted service. Users should upgrade to AWS DocumentDB MCP Server version 1.0.12 or later to remediate this vulnerability. Check the AWS security bulletin at https://aws.amazon.com/security/security-bulletins/2026-076-aws/ for the latest guidance and confirmation of patch status.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- AMZN
- Date Reserved
- 2026-08-05T13:45:00.654Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
- Is Cloud Service
- true
- Vendor Advisory Urls
- [{"url":"https://aws.amazon.com/security/security-bulletins/2026-076-aws/","vendor":"AWS"}]
Threat ID: 6a739c88bf8831d5396b2ffd
Added to database: 08/05/2026, 20:26:48 UTC
Last enriched: 08/05/2026, 20:44:01 UTC
Last updated: 08/05/2026, 23:35:25 UTC
Views: 6
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