CVE-2026-49120 Medplum < 5.1.14 SSRF via FHIR Subscription Endpoint
Authenticated users can exploit SSRF in Medplum to access internal services and exfiltrate sensitive data like IAM credentials and health records.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-49120?
CVE-2026-49120 is a medium-severity server-side request forgery vulnerability in medplum, published on 2 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Weakness: CWE-918
Which versions are affected by CVE-2026-49120?
How do I fix CVE-2026-49120?
No fix has been published for CVE-2026-49120 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-2026-49120 being exploited?
There is no known exploitation of CVE-2026-49120 in the wild and no public exploit code.
Sources
Also known as GHSA-w852-7r27-32c6.