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Description

Medplum before 5.1.14 contains a server-side request forgery vulnerability in the subscription worker that allows authenticated users to perform unauthorized internal network requests by creating FHIR Subscription resources with arbitrary endpoint URLs. Attackers can point subscription endpoints at internal addresses such as cloud instance metadata services, internal databases, or container orchestration endpoints to exfiltrate IAM credentials and patient health records via the POST body containing full FHIR resource payloads.

PUBLISHED Reserved 2026-05-27 | Published 2026-06-02 | Updated 2026-06-03 | Assigner VulnCheck




MEDIUM: 6.3CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:H/SI:L/SA:N

HIGH: 8.5CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N

Problem types

Server-Side Request Forgery (SSRF)

Product status

Default status
affected

Any version before 5.1.14
affected

Credits

Katriel Moses finder

VulnCheck finder

References

github.com/medplum/medplum/releases/tag/v5.1.14 release-notes

github.com/medplum/medplum/pull/9334 issue-tracking

github.com/...ommit/87595e98d756d840d70d9dc87beb9d4f9e158b59 patch

www.vulncheck.com/...lum-ssrf-via-fhir-subscription-endpoint third-party-advisory

cve.org (CVE-2026-49120)

nvd.nist.gov (CVE-2026-49120)

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