critical9.8
CVE-2026-33180
HAPI FHIR HTTP authentication leak in redirects
Impact
### Impact 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. ### Patches This issue has been patched in release 6.8.3 ### Workarounds None.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| maven | ca.uhn.hapi.fhir:org.hl7.fhir.utilities | < 6.9.0 | 6.9.0 |
| maven | ca.uhn.hapi.fhir:org.hl7.fhir.convertors | < 6.9.0 | 6.9.0 |
| maven | ca.uhn.hapi.fhir:org.hl7.fhir.dstu2 | < 6.9.0 | 6.9.0 |
| maven | ca.uhn.hapi.fhir:org.hl7.fhir.dstu3 | < 6.9.0 | 6.9.0 |
| maven | ca.uhn.hapi.fhir:org.hl7.fhir.dstu3.support | < 6.9.0 | 6.9.0 |
| maven | ca.uhn.hapi.fhir:org.hl7.fhir.dstu2016may | < 6.9.0 | 6.9.0 |
| maven | ca.uhn.hapi.fhir:org.hl7.fhir.model | < 6.9.0 | 6.9.0 |
| maven | ca.uhn.hapi.fhir:org.hl7.fhir.r4 | < 6.9.0 | 6.9.0 |
| maven | ca.uhn.hapi.fhir:org.hl7.fhir.r4b | < 6.9.0 | 6.9.0 |
| maven | ca.uhn.hapi.fhir:org.hl7.fhir.r5 | < 6.9.0 | 6.9.0 |
| maven | ca.uhn.hapi.fhir:org.hl7.fhir.validation | < 6.9.0 | 6.9.0 |
| maven | ca.uhn.hapi.fhir:org.hl7.fhir.validation.cli | < 6.9.0 | 6.9.0 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/hapifhir/org.hl7.fhir.core/security/advisories/GHSA-p7m9-v2cm-2h7m
- https://access.redhat.com/security/cve/CVE-2026-33180
- https://bugzilla.redhat.com/show_bug.cgi?id=2449841
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-33180.json
- https://github.com/advisories/GHSA-p7m9-v2cm-2h7m
- https://nvd.nist.gov/vuln/detail/CVE-2026-33180