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CVE-2026-45367— HAPI FHIR: ReDoS via FHIRPath matches()/replaceMatches() in FHIR Validator HTTP Endpoint

Quick assessment

Affected
hapifhir org.hl7.fhir.core
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

hapifhir org.hl7.fhir.core是hapifhir组织的一款用于处理医疗健康信息交换标准的开发框架。 hapifhir org.hl7.fhir.core 6.9.7之前版本存在资源管理错误漏洞，该漏洞源于FHIRPathEngine实现将用户控制的正则表达式传递给Java正则表达式操作时未设置有效超时，可能导致灾难性回溯和拒绝服务。

CVSS 7.5 · High EPSS 0.49% · P40

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 1

VendorProduct Version RangeStatus
hapifhir org.hl7.fhir.core < 6.9.7 affected
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I. Basic Information for CVE-2026-45367

Vulnerability Information
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Vulnerability Title
HAPI FHIR: ReDoS via FHIRPath matches()/replaceMatches() in FHIR Validator HTTP Endpoint
Source: CVE Program / CVE List V5
Vulnerability Description
HAPI FHIR is a complete implementation of the HL7 FHIR standard for healthcare interoperability in Java. Prior to 6.9.7, the FHIRPathEngine implementation passes user-controlled regular expressions from matches(), matchesFull(), and replaceMatches() to Java regex operations without effective timeouts, allowing catastrophic backtracking and denial of service. This issue is fixed in version 6.9.7.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
CWE-1333
Source: CVE Program / CVE List V5
Vulnerability Title
hapifhir org.hl7.fhir.core 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
hapifhir org.hl7.fhir.core是hapifhir组织的一款用于处理医疗健康信息交换标准的开发框架。 hapifhir org.hl7.fhir.core 6.9.7之前版本存在资源管理错误漏洞，该漏洞源于FHIRPathEngine实现将用户控制的正则表达式传递给Java正则表达式操作时未设置有效超时，可能导致灾难性回溯和拒绝服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
hapifhir org.hl7.fhir.core < 6.9.7 -

II. Public POCs for CVE-2026-45367

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 8189 chars
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Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
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III. Intelligence Information for CVE-2026-45367

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Patches & Fixes for CVE-2026-45367 (3)

Vendor Advisories for CVE-2026-45367 (1)

IV. Related Vulnerabilities

Same product: org.hl7.fhir.core
Same vendor: hapifhir
Same weakness: CWE-1333

V. Comments for CVE-2026-45367

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