CVE-2026-49485

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Source
https://cve.org/CVERecord?id=CVE-2026-49485
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-49485.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-49485
Aliases
Downstream
Published
2026-07-17T20:59:47Z
Modified
2026-11-11T02:49:26Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
HAPI FHIR: ReDoS via FHIRPath matches()/replaceMatches() in FHIR Validator HTTP Endpoint
Details

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.

Database specific 
{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-1333",
        "CWE-400"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/49xxx/CVE-2026-49485.json"
}
References

Affected packages

Git / github.com/hapifhir/org.hl7.fhir.core

Affected ranges

Type
GIT
Repo
https://github.com/hapifhir/org.hl7.fhir.core
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
22d22a7c5faeb5fd94850fb96bb61440edc0b5b2
Introduced
d9fbe3b7c9065766101562bcaae4f04fbb41d00d
Fixed
f50ef63a178c756ce3774b8b1cc5d3fd87dac04c
Database specific
Show details 
{
    "extracted_events": [
        {
            "range": [
                {
                    "introduced": "0"
                },
                {
                    "fixed": "6.9.4.2"
                }
            ],
            "source": "AFFECTED_FIELD",
            "strategy": "StringRangeExpression"
        },
        {
            "range": [
                {
                    "introduced": "6.9.5"
                },
                {
                    "fixed": "6.9.9"
                }
            ],
            "source": "AFFECTED_FIELD",
            "strategy": "StringRangeExpression"
        }
    ]
}

Affected versions

6.*
6.7.11
6.8.1
6.8.2
6.9.0
6.9.1
6.9.2
6.9.3
6.9.4
6.9.4.1
6.9.5
6.9.6
6.9.7
6.9.8

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-49485.json"