CVE-2026-33180 HAPI FHIR HTTP authentication leak in redirects
HAPI FHIR leaks sensitive HTTP headers to redirect targets, potentially exposing privacy data or enabling client impersonation.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-33180?
CVE-2026-33180 is a high-severity vulnerability in hapifhir org.hl7.fhir.core, published on 20 Mar 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
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.
Which versions are affected by CVE-2026-33180?
24 open source packages ship an affected version, including ca.uhn.hapi.fhir:org.hl7.fhir.convertors, ca.uhn.hapi.fhir:org.hl7.fhir.dstu2 and ca.uhn.hapi.fhir:org.hl7.fhir.dstu2016may.
| Package | Affected | Fixed in |
|---|---|---|
ca.uhn.hapi.fhir:org.hl7.fhir.convertors Maven | All versions | 6.9.0 |
ca.uhn.hapi.fhir:org.hl7.fhir.convertors Maven | All versions | 6.9.0 |
ca.uhn.hapi.fhir:org.hl7.fhir.dstu2 Maven | All versions | 6.9.0 |
ca.uhn.hapi.fhir:org.hl7.fhir.dstu2 Maven | All versions | 6.9.0 |
ca.uhn.hapi.fhir:org.hl7.fhir.dstu2016may Maven | All versions | 6.9.0 |
ca.uhn.hapi.fhir:org.hl7.fhir.dstu2016may Maven | All versions | 6.9.0 |
18 more packages
ca.uhn.hapi.fhir:org.hl7.fhir.dstu3 Maven | All versions | 6.9.0 |
ca.uhn.hapi.fhir:org.hl7.fhir.dstu3 Maven | All versions | 6.9.0 |
ca.uhn.hapi.fhir:org.hl7.fhir.dstu3.support Maven | All versions | 6.9.0 |
ca.uhn.hapi.fhir:org.hl7.fhir.dstu3.support Maven | All versions | 6.9.0 |
ca.uhn.hapi.fhir:org.hl7.fhir.model Maven | All versions | 6.9.0 |
ca.uhn.hapi.fhir:org.hl7.fhir.model Maven | All versions | 6.9.0 |
ca.uhn.hapi.fhir:org.hl7.fhir.r4 Maven | All versions | 6.9.0 |
ca.uhn.hapi.fhir:org.hl7.fhir.r4 Maven | All versions | 6.9.0 |
ca.uhn.hapi.fhir:org.hl7.fhir.r4b Maven | All versions | 6.9.0 |
ca.uhn.hapi.fhir:org.hl7.fhir.r4b Maven | All versions | 6.9.0 |
ca.uhn.hapi.fhir:org.hl7.fhir.r5 Maven | All versions | 6.9.0 |
ca.uhn.hapi.fhir:org.hl7.fhir.r5 Maven | All versions | 6.9.0 |
ca.uhn.hapi.fhir:org.hl7.fhir.utilities Maven | All versions | 6.9.0 |
ca.uhn.hapi.fhir:org.hl7.fhir.utilities Maven | All versions | 6.9.0 |
ca.uhn.hapi.fhir:org.hl7.fhir.validation Maven | All versions | 6.9.0 |
ca.uhn.hapi.fhir:org.hl7.fhir.validation Maven | All versions | 6.9.0 |
ca.uhn.hapi.fhir:org.hl7.fhir.validation.cli Maven | All versions | 6.9.0 |
ca.uhn.hapi.fhir:org.hl7.fhir.validation.cli Maven | All versions | 6.9.0 |
How do I fix CVE-2026-33180?
Upgrade ca.uhn.hapi.fhir:org.hl7.fhir.convertors to 6.9.0 or later.
Is CVE-2026-33180 being exploited?
There is no known exploitation of CVE-2026-33180 in the wild and no public exploit code.
Sources
Also known as GHSA-p7m9-v2cm-2h7m, ROOT-APP-MAVEN-CVE-2026-33180.