Paper/Archive/CVE-2026-15643

CVE-2026-15643

AWS awslabs.healthlake-mcp-server — AWS HealthLake MCP Server SSRF via Pagination URL

CVSS 9.2 (CNA)9.2 / 10 × 3027.6 Not in CISA KEV+300.0 EPSS percentile 33.2.332 × 206.6 No public exploit+100.0 SSVC exploitation: none+100.0

Description · from the CVE record

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

ProductAffectedFixed inSource

awslabs.healthlake-mcp-server< 0.0.140.0.14CNA

Scores by source

AMZN (CNA)9.2CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:H/VI:H/VA:N/SC:H/SI:N/SA:N

AMZN (CNA)7.3CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N

CISA ADPSSVCExploitation: none · Automatable: no · Technical impact: total

References

refpypi.org/project/awslabs.healthlake-mcp-server/0.0.14 advisoryaws.amazon.com/security/security-bulletins/2026-054-aws