Authenticated SSRF via arbitrary rest-hook URLs
Published Jun 2, 2026 · Updated Jun 2, 2026
Server-side request forgery in Medplum before 5.1.14 allows remote authenticated users to trigger rest-hook POST requests to arbitrary URLs. The subscription worker passes each user-controlled channel endpoint to fetch and sends the complete triggering FHIR resource as the request body without first enforcing an HTTPS scheme. Permission to create a Subscription is required; the server can reach internal services and transmit clinical data or credentials to attacker-controlled endpoints.
Summary
What happened
Server-side request forgery in Medplum before 5.1.14 allows remote authenticated users to trigger rest-hook POST requests to arbitrary URLs. The subscription worker passes each user-controlled channel endpoint to fetch and sends the complete triggering FHIR resource as the request body without first enforcing an HTTPS scheme. Permission to create a Subscription is required; the server can reach internal services and transmit clinical data or credentials to attacker-controlled endpoints.
The record
- CVE
- CVE-2026-49120
- Published
- Jun 2, 2026
- Updated
- Jun 2, 2026
- Vendor
- Medplum
- Product
- Medplum
- Classifications
- CWE-918, T1090
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Jun 2, 2026CVE publishedPublication date reported by the CVE source.
- Jun 2, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=0 <5.1.14
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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