Uncontrolled Recursion in FHIR - CVE-2026-62295
Published: July 14, 2026
Vulnerability identifier: #VU137480
CSH Severity: Medium
CVSS v4: 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]
CVE-ID: CVE-2026-62295
CWE-ID: CWE-674
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
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.
Affected software
FHIR
How to mitigate CVE-2026-62295
Install security update from vendor's website.
FHIR - update to 6.9.11