HAPI FHIR HTTP authentication leak in redirects
Priority LOW 39CWE-200Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- High · None · None
- Fix status
- Partial Red Hat: 1 without a fix
Attack profile from CVSS 3.1 · CNA. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-200.
Summary
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00281 20th percentileScored 2026-11-07
Fix Partial org.hl7.fhir.core (hapifhir): 6.9.0ca.uhn.hapi.fhir:org.hl7.fhir.utilities (Maven): 6.9.0+11 more productsRed Hat: 1 without a fix
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| hapifhir | org.hl7.fhir.core | before 6.9.0 | 6.9.0 | Patch available | CNA |
| — | ca.uhn.hapi.fhir:org.hl7.fhir.utilities (Maven) | before 6.9.0 | 6.9.0 | Patch available | GHSA-p7m9-v2cm-2h7m |
| — | ca.uhn.hapi.fhir:org.hl7.fhir.convertors (Maven) | before 6.9.0 | 6.9.0 | Patch available | GHSA-p7m9-v2cm-2h7m |
| — | ca.uhn.hapi.fhir:org.hl7.fhir.dstu2 (Maven) | before 6.9.0 | 6.9.0 | Patch available | GHSA-p7m9-v2cm-2h7m |
| — | ca.uhn.hapi.fhir:org.hl7.fhir.dstu3 (Maven) | before 6.9.0 | 6.9.0 | Patch available | GHSA-p7m9-v2cm-2h7m |
| — | ca.uhn.hapi.fhir:org.hl7.fhir.dstu3.support (Maven) | before 6.9.0 | 6.9.0 | Patch available | GHSA-p7m9-v2cm-2h7m |
| — | ca.uhn.hapi.fhir:org.hl7.fhir.dstu2016may (Maven) | before 6.9.0 | 6.9.0 | Patch available | GHSA-p7m9-v2cm-2h7m |
| — | ca.uhn.hapi.fhir:org.hl7.fhir.model (Maven) | before 6.9.0 | 6.9.0 | Patch available | GHSA-p7m9-v2cm-2h7m |
| — | ca.uhn.hapi.fhir:org.hl7.fhir.r4 (Maven) | before 6.9.0 | 6.9.0 | Patch available | GHSA-p7m9-v2cm-2h7m |
| — | ca.uhn.hapi.fhir:org.hl7.fhir.r4b (Maven) | before 6.9.0 | 6.9.0 | Patch available | GHSA-p7m9-v2cm-2h7m |
| — | ca.uhn.hapi.fhir:org.hl7.fhir.r5 (Maven) | before 6.9.0 | 6.9.0 | Patch available | GHSA-p7m9-v2cm-2h7m |
| — | ca.uhn.hapi.fhir:org.hl7.fhir.validation (Maven) | before 6.9.0 | 6.9.0 | Patch available | GHSA-p7m9-v2cm-2h7m |
| — | ca.uhn.hapi.fhir:org.hl7.fhir.validation.cli (Maven) | before 6.9.0 | 6.9.0 | Patch available | GHSA-p7m9-v2cm-2h7m |
- org.hl7.fhir.core Vendorhapifhir Affected before 6.9.0 Fixed in 6.9.0 Patch available CNA
- ca.uhn.hapi.fhir:org.hl7.fhir.utilities (Maven) Vendor— Affected before 6.9.0 Fixed in 6.9.0 Patch available GHSA-p7m9-v2cm-2h7m
- ca.uhn.hapi.fhir:org.hl7.fhir.convertors (Maven) Vendor— Affected before 6.9.0 Fixed in 6.9.0 Patch available GHSA-p7m9-v2cm-2h7m
- ca.uhn.hapi.fhir:org.hl7.fhir.dstu2 (Maven) Vendor— Affected before 6.9.0 Fixed in 6.9.0 Patch available GHSA-p7m9-v2cm-2h7m
- ca.uhn.hapi.fhir:org.hl7.fhir.dstu3 (Maven) Vendor— Affected before 6.9.0 Fixed in 6.9.0 Patch available GHSA-p7m9-v2cm-2h7m
- ca.uhn.hapi.fhir:org.hl7.fhir.dstu3.support (Maven) Vendor— Affected before 6.9.0 Fixed in 6.9.0 Patch available GHSA-p7m9-v2cm-2h7m
- ca.uhn.hapi.fhir:org.hl7.fhir.dstu2016may (Maven) Vendor— Affected before 6.9.0 Fixed in 6.9.0 Patch available GHSA-p7m9-v2cm-2h7m
- ca.uhn.hapi.fhir:org.hl7.fhir.model (Maven) Vendor— Affected before 6.9.0 Fixed in 6.9.0 Patch available GHSA-p7m9-v2cm-2h7m
- ca.uhn.hapi.fhir:org.hl7.fhir.r4 (Maven) Vendor— Affected before 6.9.0 Fixed in 6.9.0 Patch available GHSA-p7m9-v2cm-2h7m
- ca.uhn.hapi.fhir:org.hl7.fhir.r4b (Maven) Vendor— Affected before 6.9.0 Fixed in 6.9.0 Patch available GHSA-p7m9-v2cm-2h7m
- ca.uhn.hapi.fhir:org.hl7.fhir.r5 (Maven) Vendor— Affected before 6.9.0 Fixed in 6.9.0 Patch available GHSA-p7m9-v2cm-2h7m
- ca.uhn.hapi.fhir:org.hl7.fhir.validation (Maven) Vendor— Affected before 6.9.0 Fixed in 6.9.0 Patch available GHSA-p7m9-v2cm-2h7m
- ca.uhn.hapi.fhir:org.hl7.fhir.validation.cli (Maven) Vendor— Affected before 6.9.0 Fixed in 6.9.0 Patch available GHSA-p7m9-v2cm-2h7m
Remediation
- Fix · CNA org.hl7.fhir.core (hapifhir) Fixed in 6.9.0
- Fix · GHSA-p7m9-v2cm-2h7m ca.uhn.hapi.fhir:org.hl7.fhir.utilities (Maven) Fixed in 6.9.0 Advisory →
- Fix · GHSA-p7m9-v2cm-2h7m ca.uhn.hapi.fhir:org.hl7.fhir.convertors (Maven) Fixed in 6.9.0 Advisory →
- Fix · GHSA-p7m9-v2cm-2h7m ca.uhn.hapi.fhir:org.hl7.fhir.dstu2 (Maven) Fixed in 6.9.0 Advisory →
- Fix · GHSA-p7m9-v2cm-2h7m ca.uhn.hapi.fhir:org.hl7.fhir.dstu3 (Maven) Fixed in 6.9.0 Advisory →
- Fix · GHSA-p7m9-v2cm-2h7m ca.uhn.hapi.fhir:org.hl7.fhir.dstu3.support (Maven) Fixed in 6.9.0 Advisory →
- Fix · GHSA-p7m9-v2cm-2h7m ca.uhn.hapi.fhir:org.hl7.fhir.dstu2016may (Maven) Fixed in 6.9.0 Advisory →
- Fix · GHSA-p7m9-v2cm-2h7m ca.uhn.hapi.fhir:org.hl7.fhir.model (Maven) Fixed in 6.9.0 Advisory →
- Fix · GHSA-p7m9-v2cm-2h7m ca.uhn.hapi.fhir:org.hl7.fhir.r4 (Maven) Fixed in 6.9.0 Advisory →
- Fix · GHSA-p7m9-v2cm-2h7m ca.uhn.hapi.fhir:org.hl7.fhir.r4b (Maven) Fixed in 6.9.0 Advisory →
- Fix · GHSA-p7m9-v2cm-2h7m ca.uhn.hapi.fhir:org.hl7.fhir.r5 (Maven) Fixed in 6.9.0 Advisory →
- Fix · GHSA-p7m9-v2cm-2h7m ca.uhn.hapi.fhir:org.hl7.fhir.validation (Maven) Fixed in 6.9.0 Advisory →
- Fix · GHSA-p7m9-v2cm-2h7m ca.uhn.hapi.fhir:org.hl7.fhir.validation.cli (Maven) Fixed in 6.9.0 Advisory →
Vendor assessments
Red Hat
Red Hat rating: Important. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Fuse 7 | Affected | No fix planned: Will not fix |
Timeline
- 2026-10-02 Threatist record created from CVE-2026-33180
- 2026-10-03 Alias added: GHSA-p7m9-v2cm-2h7m
References
More hapifhir vulnerabilities
- TI-2026-26647 HAPI FHIR: Unauthenticated SSRF via /loadIG Chains with startsWith() Credential Leak for Authentication Token Theft CVSS 3.1CRITICAL 9.3
- TI-2026-40028 HAPI FHIR: XXE in XsltUtilities.saxonTransform via unhardened Saxon TransformerFactory CVSS 4.0HIGH 8.7
- TI-2026-26645 HAPI FHIR: Authentication Credential Leakage via Improper URL Prefix Matching on HTTP Redirect in HAPI FHIR Core CVSS 3.1CRITICAL 9.1
- TI-2026-56488 HAPI FHIR: SHCParser DEFLATE infinite loop causes denial of service CVSS 3.1HIGH 7.5
- TI-2026-56487 HAPI FHIR: SHCParser unbounded DEFLATE decompression causes denial of service CVSS 3.1HIGH 7.5
- TI-2026-44485 HAPI FHIR: XHTML narrative parser unbounded recursion causes StackOverflow denial of service CVSS 3.1HIGH 7.5
Sources
- CVE-2026-33180 · CVE Program
- CVE-2026-33180 · NVD
- FIRST EPSS
- GHSA-p7m9-v2cm-2h7m · GitHub Advisory Database · CC BY 4.0
- CVE-2026-33180 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences