SB2026071458 - Input validation error in FHIR

CSH
CYBERSECURITY HELP
Sign In REGISTER

Main Vulnerability Database SB2026071458

SB2026071458 - Input validation error in FHIR

Published: July 14, 2026

Security Bulletin ID SB2026071458
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 1
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 1 vulnerability.


1) Input validation error (CVE-ID: CVE-2026-49485)

CWE-ID: CWE-20 - Improper input validation

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 improper input validation in FHIRPathEngine when evaluating user-supplied FHIRPath regular expressions through matches(), matchesFull(), and replaceMatches(). A remote attacker can send a crafted resource containing a malicious regex pattern to cause a denial of service.

The issue is caused by catastrophic backtracking in Java regex processing, and some FHIRPathEngine method calls were not protected by the timeout utility.


Remediation

Install update from vendor's website.

References