# CVE-2026-18954: Incorrect authorization in the aggregation pipeline tool in Amazon AWS Labs DocumentDB MCP Server

> CVE-2026-18954: Incorrect authorization in the aggregation pipeline tool in Amazon AWS Labs DocumentDB MCP Server. CVSS 5.5 (CVSS 3.1).

Canonical: https://rewindex.com/cve/CVE-2026-18954
Last updated: 2026-10-23T21:10:00Z

- Published: 2026-08-05 20:07 UTC · Updated: 2026-10-23 21:10 UTC · Assigner: AMZN
- CVSS: 5.5 (CVSS 3.1) · Severity: Medium · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
- EPSS: 0.16%, 5th percentile (scored 2026-10-25)
- CISA KEV: no
- CWE: CWE-863

## 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.

## Affected vendors and products

- AWS: documentdb-mcp-server

## Tracked companies

- [Amazon Web Services](https://rewindex.com/company/aws.md)

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2026-18954)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2026-18954)
- [https://aws.amazon.com/security/security-bulletins/2026-076-aws/](https://aws.amazon.com/security/security-bulletins/2026-076-aws/)
- [https://github.com/awslabs/mcp/releases/tag/2026.04.20260408085348](https://github.com/awslabs/mcp/releases/tag/2026.04.20260408085348)
- [https://github.com/awslabs/mcp/security/advisories/GHSA-j694-4m5j-w8hc](https://github.com/awslabs/mcp/security/advisories/GHSA-j694-4m5j-w8hc)

---

_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


---
Canonical: https://rewindex.com/cve/CVE-2026-18954 · Markdown: https://rewindex.com/cve/CVE-2026-18954.md · JSON: https://rewindex.com/api/v1/cves/CVE-2026-18954 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T02:16:23.921Z