Cross-site scripting in FHIR - CVE-2026-62293
Published: July 14, 2026
Vulnerability identifier: #VU137478
CSH Severity: Medium
CVSS v4: 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]
CVE-ID: CVE-2026-62293
CWE-ID: CWE-79
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
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.
Affected software
FHIR
How to mitigate CVE-2026-62293
Install security update from vendor's website.
FHIR - update to 6.9.11