VDB-354453 · CVE-2026-34361 · GHSA-vr79-8m62-wh98

hapifhir org.hl7.fhir.core up to 6.9.3 Validator HTTP Service /loadIG startsWith file access

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
7.2	$0-$5k	0.10

Summaryinfo

A vulnerability, which was classified as problematic, has been found in hapifhir org.hl7.fhir.core up to 6.9.3. Affected by this vulnerability is the function startsWith of the file /loadIG of the component Validator HTTP Service. Performing a manipulation results in file access. This vulnerability was named CVE-2026-34361. The attack may be initiated remotely. There is no available exploit. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in hapifhir org.hl7.fhir.core up to 6.9.3. It has been classified as problematic. This affects the function startsWith of the file /loadIG of the component Validator HTTP Service. The manipulation with an unknown input leads to a file access vulnerability. CWE is classifying the issue as CWE-552. The product makes files or directories accessible to unauthorized actors, even though they should not be. This is going to have an impact on confidentiality. The summary by CVE is:

HAPI FHIR is a complete implementation of the HL7 FHIR standard for healthcare interoperability in Java. Prior to version 6.9.4, the FHIR Validator HTTP service exposes an unauthenticated "/loadIG" endpoint that makes outbound HTTP requests to attacker-controlled URLs. Combined with a startsWith() URL prefix matching flaw in the credential provider (ManagedWebAccessUtils.getServer()), an attacker can steal authentication tokens (Bearer, Basic, API keys) configured for legitimate FHIR servers by registering a domain that prefix-matches a configured server URL. This issue has been patched in version 6.9.4.

The advisory is shared at github.com. This vulnerability is uniquely identified as CVE-2026-34361 since 03/27/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1083 for this issue.

Upgrading to version 6.9.4 eliminates this vulnerability.

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Productinfo

Vendor

hapifhir

Name

org.hl7.fhir.core

Version

Website

Product: https://github.com/hapifhir/org.hl7.fhir.core/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 7.2

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 9.3
CNA Vector (GitHub_M): 🔒

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
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Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: File access
CWE: CWE-552 / CWE-425
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: org.hl7.fhir.core 6.9.4

Timelineinfo

03/27/2026 CVE reserved
03/31/2026 +3 days Advisory disclosed
03/31/2026 +0 days VulDB entry created
03/31/2026 +0 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: GHSA-vr79-8m62-wh98
Status: Confirmed

CVE: CVE-2026-34361 (🔒)
GCVE (CVE): GCVE-0-2026-34361
GCVE (VulDB): GCVE-100-354453

Entryinfo

Created: 03/31/2026 20:00
Changes: 03/31/2026 20:00 (67)
Complete: 🔍
Cache ID: 216:991:103