Vulnerability · Published Jul 14, 2026 · Assigned by AMZN

CVE-2026-15643AWS HealthLake MCP Server SSRF via Pagination URL

High 7.3

In plain English

A high-severity server-side request forgery in awslabs.healthlake-mcp-server from AWS. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 33% of all known vulnerabilities).

Severity (CVSS 3.1)7.3High

Exploit odds (30 days)0.4%top 66.7% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

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.

Affected products (as reported)

Vendor	Product	Versions
AWS	awslabs.healthlake-mcp-server	0 – before 0.0.14

Weakness: CWE-918 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N

References

https://pypi.org/project/awslabs.healthlake-mcp-server/0.0.14/ release-notes
https://aws.amazon.com/security/security-bulletins/2026-054-aws/ vendor-advisory