CVE-2026-18954

Summary

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 Software

Weaknesses

• CWE-863: CWE-863: Incorrect Authorization

ADP Enrichment

CISA ADP Vulnrichment

• SSVC:
• Exploitation: none
  • Automatable: no
  • Technical Impact: partial

References

• https://github.com/awslabs/mcp/releases/tag/2026.04.20260408085348
• https://aws.amazon.com/security/security-bulletins/2026-076-aws/
• https://github.com/awslabs/mcp/security/advisories/GHSA-j694-4m5j-w8hc

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