CVSS 3.1
9.1 criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:NCVE-2026-34359
Critical (9.1) in hapifhir hl7 fhir core. EPSS 0.2% chance of exploitation in the next 30 days. Fixed in ca.uhn.hapi.fhir:org.hl7.fhir.core 6.9.4.
HAPI FHIR is a complete implementation of the HL7 FHIR standard for healthcare interoperability in Java. Prior to version 6.9.4, ManagedWebAccessUtils.getServer() uses String.startsWith() to match request URLs against configured server URLs for authentication credential dispatch. Because configured server URLs (e.g., http://tx.fhir.org) lack a trailing slash or host boundary check, an attacker-controlled domain like http://tx.fhir.org.attacker.com matches the prefix and receives Bearer tokens, Basic auth credentials, or API keys when the HTTP client follows a redirect to that domain. This issue has been patched in version 6.9.4.
Severity
- EPSS
- 0.2% chance of exploitation in the next 30 days; higher than 5% of CVEs (scores of 2026-10-31)
- CWE
- CWE-346
- Published
- Modified
- Record from
- the NVD, synced
Affected
- hapifhir:hl7_fhir_core
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-fgv2-4q4g-wc35 | Maven | ca.uhn.hapi.fhir:org.hl7.fhir.core | <6.9.4 | 6.9.4 |
| GHSA-fgv2-4q4g-wc35 | Maven | ca.uhn.hapi.fhir:org.hl7.fhir.utilities | <6.9.4 | 6.9.4 |