Answer in brief
CVE-2026-62295 records a Unknown severity vulnerability in HAPI FHIR: JSON utility parser unbounded recursion causes StackOverflow denial of service. The current sources do not mark it as known exploited. The current feed maps hapifhir/ca.uhn.hapi.fhir:org.hl7.fhir.r5 (generic), hapifhir/ca.uhn.hapi.fhir:org.hl7.fhir.utilities (generic), hapifhir/ca.uhn.hapi.fhir:org.hl7.fhir.validation (generic), hapifhir/ca.uhn.hapi.fhir:org.hl7.fhir.validation.cli (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
Answer in brief
CVE-2026-62295 records a Unknown severity vulnerability in HAPI FHIR: JSON utility parser unbounded recursion causes StackOverflow denial of service. The current sources do not mark it as known exploited. The current feed maps hapifhir/ca.uhn.hapi.fhir:org.hl7.fhir.r5 (generic), hapifhir/ca.uhn.hapi.fhir:org.hl7.fhir.utilities (generic), hapifhir/ca.uhn.hapi.fhir:org.hl7.fhir.validation (generic), hapifhir/ca.uhn.hapi.fhir:org.hl7.fhir.validation.cli (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps hapifhir/ca.uhn.hapi.fhir:org.hl7.fhir.r5 (generic), hapifhir/ca.uhn.hapi.fhir:org.hl7.fhir.utilities (generic), hapifhir/ca.uhn.hapi.fhir:org.hl7.fhir.validation (generic), hapifhir/ca.uhn.hapi.fhir:org.hl7.fhir.validation.cli (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| hapifhir/ca.uhn.hapi.fhir:org.hl7.fhir.r5generic | < 6.9.11 | Not reported |
| hapifhir/ca.uhn.hapi.fhir:org.hl7.fhir.utilitiesgeneric | < 6.9.11 | Not reported |
| hapifhir/ca.uhn.hapi.fhir:org.hl7.fhir.validationgeneric | < 6.9.11 | Not reported |
| hapifhir/ca.uhn.hapi.fhir:org.hl7.fhir.validation.cligeneric | < 6.9.11 | Not reported |
| hapifhir/org.hl7.fhir.coregeneric | < 6.9.11 | Not reported |
Published upstream
Aug 7, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 7, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 7, 2026
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.
Quoted source text, attributed separately from HOL analysis.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps hapifhir/ca.uhn.hapi.fhir:org.hl7.fhir.r5 (generic), hapifhir/ca.uhn.hapi.fhir:org.hl7.fhir.utilities (generic), hapifhir/ca.uhn.hapi.fhir:org.hl7.fhir.validation (generic), hapifhir/ca.uhn.hapi.fhir:org.hl7.fhir.validation.cli (generic) and additional mapped packages. Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| hapifhir/ca.uhn.hapi.fhir:org.hl7.fhir.r5generic | < 6.9.11 | Not reported |
| hapifhir/ca.uhn.hapi.fhir:org.hl7.fhir.utilitiesgeneric | < 6.9.11 | Not reported |
| hapifhir/ca.uhn.hapi.fhir:org.hl7.fhir.validationgeneric | < 6.9.11 | Not reported |
| hapifhir/ca.uhn.hapi.fhir:org.hl7.fhir.validation.cligeneric | < 6.9.11 | Not reported |
| hapifhir/org.hl7.fhir.coregeneric | < 6.9.11 | Not reported |
Published upstream
Aug 7, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 7, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 7, 2026
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.
Quoted source text, attributed separately from HOL analysis.