Vulnerability in Hapifhir Hl7 Fhir Core
CVE-2026-34359
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.4 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.002 (9.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 9th percentile — 9.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: +0.000
Affected products
- Hapifhir Hl7 Fhir Core
- Hapifhir Org.hl7.fhir.core — versions < 6.9.4
Weakness classification (CWE)
References
- github.com/hapifhir/org.hl7.fhir.core/security/advisories/GHSA-fgv2-4q4g-wc35 (Exploit, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-34359?
- CVE-2026-34359 is a high-severity vulnerability in Hapifhir Hl7 Fhir Core, classified under Origin Validation Error. CVSS score: 7.4/10. Published 2026-03-31.
- How severe is CVE-2026-34359?
- High severity. CVSS v3 base score is 7.4 out of 10.