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CVE-2026-49485

HIGH
7.5
CVSS 3.1
Description
HAPI FHIR is a complete implementation of the HL7 FHIR standard for healthcare interoperability in Java. Prior to 6.9.9 and 6.9.4.2, all implementations of FHIRPathEngine accept arbitrary FHIRPath expressions and evaluate them without input validation, and the FHIRPath functions matches(), matchesFull(), and replaceMatches() pass user-controlled regular expressions to Java's Pattern.compile() and String.replaceAll() through an incomplete timeout utility. An attacker can send a resource containing an evil regex pattern that causes catastrophic backtracking, exhausting CPU resources and causing denial of service in the FHIR Validator HTTP endpoint and affected org.hl7.fhir.* modules. This issue is fixed in versions 6.9.9 and 6.9.4.2.

Metadata

CVE ID
CVE-2026-49485
State
PUBLISHED
Assigner
GitHub_M
Reserved
2026-05-30 04:17 UTC
Published
2026-07-17 20:59 UTC
Last updated
2026-07-17 20:59 UTC
Primary CWE
CWE-1333
CWE-1333: Inefficient Regular Expression Complexity
Vendor / Product
hapifhir / org.hl7.fhir.core
Sources
cve.org  ·  NVD

Severity & Metrics

7.5 HIGH CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected products (1)
VendorProductPlatformVersions
hapifhir org.hl7.fhir.core — < 6.9.4.2, >= 6.9.5, < 6.9.9
Weakness (CWE)
CWESourceDescription
CWE-1333 cna CWE-1333: Inefficient Regular Expression Complexity
CWE-400 cna CWE-400: Uncontrolled Resource Consumption
CVSS scores (1)
ScoreSeverityVersionSourceVector
7.5 HIGH 3.1 cna CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
References (6)
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