CVE-2026-62295

highpriority · track · 0EPSS 0.005 · 42 %ileEU

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

0.49% (42nd) EPSS

CVSS 7.5 · high

Is it mine?

5 products

Check your exposure

Who says so?

2 sources

cnnvd · enisa_euvd

EPSS · scored 2026-10-28

HAPI FHIR is a complete implementation of the HL7 FHIR standard for healthcare interoperability in Java. Prior to 6.9.11, the JSON utility parser in org.hl7.fhir.utilities.json.parser.JsonParser enforces no maximum nesting depth for arrays or objects. As a result, a small but deeply nested, syntactically valid FHIR JSON document can trigger unbounded readArray() or readObject() recursion, raising a StackOverflowError before structural validation runs. An attacker who can submit JSON resources for validation can thus crash the request thread, and services that do not isolate StackOverflowError safely may experience worker loss or process instability — a denial-of-service condition. This issue is fixed in version 6.9.11.

cvss

Technical severity, 0–10. One row per scoring source.

7.5

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.9–7.5

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · ENISA EU

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · security-advisories@github.comexploitability 3.9 · impact 3.6

v3.16.9mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:Usecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: poc · Automatable: yes · Technical Impact: partialcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-20USCWE-400USCWE-674US

affected products (5)

Products and version ranges known to be affected.

hapifhir ca.uhn.hapi.fhir:org.hl7.fhir.r5≤ < 6.9.11enisa_euvdEU
hapifhir ca.uhn.hapi.fhir:org.hl7.fhir.utilities≤ < 6.9.11enisa_euvdEU
hapifhir ca.uhn.hapi.fhir:org.hl7.fhir.validation≤ < 6.9.11enisa_euvdEU
hapifhir ca.uhn.hapi.fhir:org.hl7.fhir.validation.cli≤ < 6.9.11enisa_euvdEU
hapifhir org.hl7.fhir.core≤ < 6.9.11enisa_euvdEU

also known as (2)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd NVD CVE.org MITRE

published 2026-08-07modified 2026-08-13

references (6)

External citations — patches, advisories, analysis.

scry

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