Information disclosure in Hapifhir Org.hl7.fhir.core
CVE-2026-33180
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.
Vulnerability class: Information Disclosure
EPSS: 0.003 (18.2th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
Affected products
- Hapifhir Org.hl7.fhir.core — versions < 6.9.0
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-33180?
- CVE-2026-33180 is a high-severity vulnerability in Hapifhir Org.hl7.fhir.core, classified under Information Disclosure. CVSS score: 7.5/10. Published 2026-03-20.
- How severe is CVE-2026-33180?
- High severity. CVSS v3 base score is 7.5 out of 10.