hapifhir org.hl7.fhir.core up to 6.8.x information disclosure

Summaryinfo

A vulnerability categorized as problematic has been discovered in hapifhir org.hl7.fhir.core up to 6.8.x. The impacted element is an unknown function. Executing a manipulation can lead to information disclosure. This vulnerability is registered as CVE-2026-33180. It is possible to launch the attack remotely. No exploit is available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in hapifhir org.hl7.fhir.core up to 6.8.x. It has been declared as problematic. This vulnerability affects an unknown functionality. The manipulation with an unknown input leads to a information disclosure vulnerability. The CWE definition for the vulnerability is CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. As an impact it is known to affect confidentiality. CVE summarizes:

HAPI FHIR is a complete implementation of the HL7 FHIR standard for healthcare interoperability in Java. Prior to version 6.9.0, when setting headers in HTTP requests, the internal HTTP client sends headers first to the host in the initial URL but also, if asked to follow redirects and a 30X HTTP response code is returned, to the host mentioned in URL in the Location: response header value. Sending the same set of headers to subsequent hosts is a problem as this header often contains privacy sensitive information or data that could allow others to impersonate the client's request. This issue has been patched in release 6.9.0. No known workarounds are available.

The advisory is available at github.com. This vulnerability was named CVE-2026-33180 since 03/17/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1592 by the MITRE ATT&CK project.

Upgrading to version 6.9.0 eliminates this vulnerability.

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Productinfo

Vendor

• hapifhir

Name

• org.hl7.fhir.core

Version

• 6.0
• 6.1
• 6.2
• 6.3
• 6.4
• 6.5
• 6.6
• 6.7
• 6.8

Website

• Product: https://github.com/hapifhir/org.hl7.fhir.core/

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