CVE-2026-49120

High

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.

SeverityHigh

CVSS8.5

Exploit probability—

ProductMedplum

PublishedJun 2, 2026

First seenJun 2, 2026

Weakness typeCWE-918Server-side request forgery (SSRF)

How to fix

Update

medplum medplum5.1.14 or later

Patches

github.com/medplum/medplum/commit/87595e98d756d840d70d9dc87beb9d4f9e158b59

Vendor advisories

github.com/medplum/medplum/releases/tag/v5.1.14

Affected products

Product	Affected versions	Fixed in
medplum medplum	v < 5.1.14	5.1.14

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