CVE-2026-55470

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Source
https://cve.org/CVERecord?id=CVE-2026-55470
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-55470.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-55470
Aliases
Downstream
Published
2026-07-08T21:27:34.034Z
Modified
2026-07-15T20:28:06.201647Z
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: DSTU2 FHIRPathEngine.matches() missing RegexTimeout protection allows ReDoS
Details

HAPI FHIR is a complete implementation of the HL7 FHIR standard for healthcare interoperability in Java. Prior to 6.9.10, the fix for CVE-2026-45367 incompletely patched the DSTU2 module, leaving FHIRPathEngine.matches() in org.hl7.fhir.dstu2/utils/FHIRPathEngine.java to call raw String.matches(sw) without RegexTimeout protection while replaceMatches() was updated, allowing an unauthenticated attacker to trigger catastrophic regex backtracking and exhaust server CPU. This issue is fixed in version 6.9.10.

Database specific 
{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-1333"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55470.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
56376f7986222626af061ca7fc27ee1ab030e590
Fixed
d46c706980e0cef66e6a477719120bbd1a7b60e3
Database specific 
{
    "source": [
        "AFFECTED_FIELD",
        "REFERENCES"
    ],
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "6.9.10"
        }
    ]
}

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
6.9.5
6.9.6
6.9.7
6.9.8
6.9.9

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-55470.json"
vanir_signatures 
[
    {
        "id": "CVE-2026-55470-224eec48",
        "signature_type": "Function",
        "signature_version": "v1",
        "source": "https://github.com/hapifhir/org.hl7.fhir.core/commit/56376f7986222626af061ca7fc27ee1ab030e590",
        "deprecated": false,
        "digest": {
            "function_hash": "316892796098957454711495247214008258758",
            "length": 539.0
        },
        "target": {
            "function": "funcMatches",
            "file": "org.hl7.fhir.dstu2/src/main/java/org/hl7/fhir/dstu2/utils/FHIRPathEngine.java"
        }
    },
    {
        "id": "CVE-2026-55470-b2eb7408",
        "signature_type": "Line",
        "signature_version": "v1",
        "source": "https://github.com/hapifhir/org.hl7.fhir.core/commit/56376f7986222626af061ca7fc27ee1ab030e590",
        "deprecated": false,
        "digest": {
            "threshold": 0.9,
            "line_hashes": [
                "91453927787293656360523711058859234062",
                "119715381216995231047359364838818779665",
                "316781900609260182033912418094931202260",
                "263988858236298414646944954832354116946",
                "54962490687670778532422037164934186390",
                "48745207366249425611431021588394570526",
                "112260565048058013092003264939483402983",
                "332868426298486685036830642227111960355",
                "62884083304422522480910970260862954647",
                "128861331169548772788572492590546930369"
            ]
        },
        "target": {
            "file": "org.hl7.fhir.dstu2/src/main/java/org/hl7/fhir/dstu2/utils/FHIRPathEngine.java"
        }
    }
]
vanir_signatures_modified 
"2026-07-15T20:28:06Z"