VulnerabilityAnalyzed

CVE-2026-18954

MEDIUM 5.7EPSS 0.11%

Does this matter?

Lower severity and a low EPSS score (0.11%). Track it; it rarely justifies an emergency change on its own.

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.

CVSS 4.0: 5.7 MEDIUMCVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M
EPSS: 0.11% probability · 1th percentile
CISA KEV: Not listed
Weakness: CWE-863
Affected: amazon/documentdb mcp server
Source: ff89ba41-3aa1-4d27-914a-91399e9639e5

References

https://aws.amazon.com/security/security-bulletins/2026-076-aws/Vendor Advisory
https://github.com/awslabs/mcp/releases/tag/2026.04.20260408085348Release Notes
https://github.com/awslabs/mcp/security/advisories/GHSA-j694-4m5j-w8hcVendor Advisory

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.