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9.2

AWS HealthLake MCP Server Exposes Temporary Security Credentials

CVE-2026-15643 · published 2 months ago
Summary

A security flaw in the AWS HealthLake MCP Server allows an attacker to steal sensitive credentials. This could enable unauthorized access to AWS resources. To fix this issue, update the AWS HealthLake MCP Server to version 0.0.14 or later.

What to do
  • Update aws awslabs.healthlake-mcp-server to version 0.0.14 or later.
Affected software
VendorProductAffected versions
aws awslabs.healthlake-mcp-server < 0.0.14
Original advisory text
AWS HealthLake MCP Server (awslabs.healthlake-mcp-server) is a Model Context Protocol server that enables AI assistants to interact with AWS HealthLake FHIR datastores. A server-side request forger...
AWS HealthLake MCP Server (awslabs.healthlake-mcp-server) is a Model Context Protocol server that enables AI assistants to interact with AWS HealthLake FHIR datastores. A server-side request forgery in the pagination handling component in AWS awslabs.healthlake-mcp-server before 0.0.14 on all platforms might allow a remote authenticated user to exfiltrate AWS temporary security credentials to an arbitrary endpoint via a crafted next_token parameter. The server does not validate that pagination URLs point back to the expected HealthLake endpoint, allowing an actor to redirect subsequent requests to an actor-controlled server.



Its recommended to upgrade to version 0.0.14 or later.
References
Severity
9.2 Critical
CVSS 3.1: 7.3 (MITRE)
Exploitation
EPSS <1%
Type
CWE-918Server-Side Request Forgery (SSRF)
Timeline
Published14 Jul 2026
Updated27 Sep 2026
First seen14 Jul 2026
Sources
CVE-2026-15643 · NVD
CVE-2026-15643 · MITRE
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