CVE-2026-15643CWE-918

AWS HealthLake MCP Server SSRF via Pagination URL

Critical · published July 14, 2026

CVSS v4.0
9.2
EPSS
0%
Percentile
31.9
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
9.2 · CRITICAL
Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:H/VI:H/VA:N/SC:H/SI:N/SA:N
EPSS
0.00390 · 31.9th percentile
Weakness
CWE-918 · Server-Side Request Forgery (SSRF)
Published
2026-07-14T20:03Z
EPSS history
Timeline
  • 14 JUL 20:03Z
    AWS HealthLake MCP Server SSRF via Pagination URL
    cvelistv5