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CVE-2026-34359

Hapifhir Hl7 Fhir Core vulnerability

7.4 HIGHPublic exploitEPSS 0.20%
  1. Published31 Mar 2026

Description

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.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityHigh
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityNone
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

Affected products

Hapifhir Hl7 Fhir Core< 6.9.4

Remediation

Fixed in
Hapifhir Hl7 Fhir Core≥ 6.9.4

References

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Frequently asked

Is CVE-2026-34359 being actively exploited?

CVE-2026-34359 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.20%.

How severe is CVE-2026-34359?

CVE-2026-34359 has a CVSS 3.1 base score of 7.4, rated high. EPSS estimates a 0.20% probability of exploitation.

Which products are affected by CVE-2026-34359?

Affected products include Hapifhir Hl7 Fhir Core.

How do I fix CVE-2026-34359?

Upgrade affected software to a fixed version, for example Hapifhir Hl7 Fhir Core 6.9.4 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-34359 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.