CVE-2026-18954

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 v3 5.5 MEDIUM

5.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://aws.amazon.com/security/security-bulletins/2026-076-aws/	Vendor Advisory
https://github.com/awslabs/mcp/releases/tag/2026.04.20260408085348	Release Notes
https://github.com/awslabs/mcp/security/advisories/GHSA-j694-4m5j-w8hc	Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:amazon:documentdb_mcp_server:*:*:*:*:*:python:*:*

History

No history.

Information

Published : 2026-08-05 20:17

Updated : 2026-08-10 15:23

NVD link : CVE-2026-18954

Mitre link : CVE-2026-18954

CVE.ORG link : CVE-2026-18954

JSON object : View

Products Affected

amazon

documentdb_mcp_server

CWE

CWE-863

Incorrect Authorization

{"id": "CVE-2026-18954", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-18954", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-08-06T13:11:40.451069Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "ff89ba41-3aa1-4d27-914a-91399e9639e5", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 1.8}], "cvssMetricV40": [{"type": "Secondary", "source": "ff89ba41-3aa1-4d27-914a-91399e9639e5", "cvssData": {"Safety": "NOT_DEFINED", "version": "4.0", "Recovery": "NOT_DEFINED", "baseScore": 5.7, "Automatable": "NOT_DEFINED", "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS: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/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "exploitMaturity": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "userInteraction": "NONE", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "LOW", "subIntegrityImpact": "NONE", "vulnIntegrityImpact": "HIGH", "integrityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "availabilityRequirement": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "subConfidentialityImpact": "NONE", "vulnConfidentialityImpact": "NONE", "confidentialityRequirement": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED"}}]}, "affected": [{"source": "ff89ba41-3aa1-4d27-914a-91399e9639e5", "affectedData": [{"vendor": "AWS", "product": "documentdb-mcp-server", "versions": [{"status": "affected", "version": "0", "lessThan": "1.0.12", "versionType": "custom"}], "defaultStatus": "unaffected"}]}], "published": "2026-08-05T20:17:08.233", "references": [{"url": "https://aws.amazon.com/security/security-bulletins/2026-076-aws/", "tags": ["Vendor Advisory"], "source": "ff89ba41-3aa1-4d27-914a-91399e9639e5"}, {"url": "https://github.com/awslabs/mcp/releases/tag/2026.04.20260408085348", "tags": ["Release Notes"], "source": "ff89ba41-3aa1-4d27-914a-91399e9639e5"}, {"url": "https://github.com/awslabs/mcp/security/advisories/GHSA-j694-4m5j-w8hc", "tags": ["Vendor Advisory"], "source": "ff89ba41-3aa1-4d27-914a-91399e9639e5"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "ff89ba41-3aa1-4d27-914a-91399e9639e5", "description": [{"lang": "en", "value": "CWE-863"}]}], "descriptions": [{"lang": "en", "value": "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.\n\n\n\nTo remediate this issue, users should upgrade to version 1.0.12 or later."}], "lastModified": "2026-08-10T15:23:15.883", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:amazon:documentdb_mcp_server:*:*:*:*:*:python:*:*", "vulnerable": true, "matchCriteriaId": "68613EFB-317A-4B5D-96E8-AA011B1CA14B", "versionEndExcluding": "1.0.12"}], "operator": "OR"}]}], "sourceIdentifier": "ff89ba41-3aa1-4d27-914a-91399e9639e5"}