CVE-2026-15643 AWS HealthLake MCP Server SSRF via Pagination URL
Remote authenticated users can exfiltrate AWS credentials via SSRF in pagination handling, requiring an upgrade to the AWS HealthLake MCP Server.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-15643?
CVE-2026-15643 is a critical server-side request forgery vulnerability in awslabs.healthlake-mcp-server, published on 14 Jul 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
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.
Weakness: CWE-918
Which versions are affected by CVE-2026-15643?
How do I fix CVE-2026-15643?
No fix has been published for CVE-2026-15643 yet. Limit exposure of the affected software until one is available.
Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.
Is CVE-2026-15643 being exploited?
There is no known exploitation of CVE-2026-15643 in the wild and no public exploit code.