Critical, CVSS 9.8MavenPublished
HAPI FHIR HTTP authentication leak in redirects
CVE-2026-33180 · GHSA-p7m9-v2cm-2h7m
- Affected
- Maven ca.uhn.hapi.fhir:org.hl7.fhir.model < 6.9.0
- Fixed in
- 6.9.0· Vendor fix available
- Issue
- 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.
Recommended action: Upgrade to 6.9.0 or later, then redeploy and verify.A vendor fix does not resolve your finding until you verify it in your own systems.