SB2026071460 - Multiple vulnerabilities in FHIR

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Main Vulnerability Database SB2026071460

SB2026071460 - Multiple vulnerabilities in FHIR

Published: July 14, 2026

Security Bulletin ID SB2026071460
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 3
Exploitation vector Remote access
Highest impact Denial of service

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 3 vulnerabilities.


1) Cross-site scripting (CVE-ID: CVE-2026-62293)

CWE-ID: CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

CVSSv4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N]


The vulnerability allows a remote attacker to execute arbitrary script in a generated HTML report.

The vulnerability exists due to cross-site scripting in org.hl7.fhir.validation.Scanner.java when generating scan.html from attacker-controlled implementation guide or profile titles and source references. A remote attacker can supply a specially crafted implementation guide or profile to execute arbitrary script in a generated HTML report.

User interaction is required to open the generated report in a browser.


2) Uncontrolled Recursion (CVE-ID: CVE-2026-62296)

CWE-ID: CWE-674 - Uncontrolled Recursion

CVSSv4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to uncontrolled recursion in the XhtmlParser XHTML narrative parser when parsing deeply nested text.div narrative content. A remote attacker can submit a specially crafted FHIR JSON or XML resource to cause a denial of service.

This affects validator services and applications that parse attacker-supplied FHIR resources containing narratives.


3) Uncontrolled Recursion (CVE-ID: CVE-2026-62295)

CWE-ID: CWE-674 - Uncontrolled Recursion

CVSSv4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to uncontrolled recursion in JsonParser.java when parsing deeply nested JSON arrays or objects. A remote attacker can submit a specially crafted JSON resource to cause a denial of service.

The issue can be triggered before FHIR structural validation rejects the input.


Remediation

Install update from vendor's website.

References