CVE-2026-45367 high CVSS 7.5

Vulnerability in ca.uhn.hapi.fhir:org.hl7.fhir.dstu2 (CVE-2026-45367)

Summary

Vulnerability in ca.uhn.hapi.fhir:org.hl7.fhir.dstu2 (CVE-2026-45367). Risk of unauthorized operations or information disclosure. Exploitable via funcMatches. Mitigation: upgrade to 6.9.7 or later.

Original description

The description as published by the source.

HAPI FHIR is a complete implementation of the HL7 FHIR standard for healthcare interoperability in Java. Prior to 6.9.7, the FHIRPathEngine implementation passes user-controlled regular expressions from matches(), matchesFull(), and replaceMatches() to Java regex operations without effective timeouts, allowing catastrophic backtracking and denial of service. This issue is fixed in version 6.9.7.

Source: GitHub Security Advisories (Global) NVD GitHub Advisory

Auto-generated summary

Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.

A vulnerability tracked as CVE-2026-45367 has been found in ca.uhn.hapi.fhir:org.hl7.fhir.dstu2.
Attackers can target a specific entry point like funcMatches over the network to misuse the product.
Risk of unauthorized operations or information disclosure. CVSS score: 7.5/10.
What to do: upgrade ca.uhn.hapi.fhir:org.hl7.fhir.dstu2 to 6.9.7 or later.
If unsure, ask your IT team or search "ca.uhn.hapi.fhir:org.hl7.fhir.dstu2 CVE-2026-45367" on the vendor's site.

CVE-2026-45367 (ca.uhn.hapi.fhir:org.hl7.fhir.dstu2) — CWE-1333 / CVSS v3 7.5
Attack vector: remote (network-reachable) / unauthenticated / no user interaction
Attack surface: funcMatches / funcMatchesFull / funcReplaceMatches / ValidationTimeout
Patched: 6.9.7 — apply immediately
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.

❓ What is the problem

A vulnerability (CWE-1333) exists in ca.uhn.hapi.fhir:org.hl7.fhir.dstu2. Attackers reach the vulnerable code path via funcMatches without authentication.

📍 Affected scope

Check the vendor advisory for the affected versions of ca.uhn.hapi.fhir:org.hl7.fhir.dstu2. Attack surface: funcMatches / funcMatchesFull / funcReplaceMatches / ValidationTimeout.

🔥 Severity

Severity: High (CVSS 7.5/10). Risk of unauthorized operations or information disclosure.

🔧 How to fix

Update to 6.9.7.

🛡️ Workaround

Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.

🔍 Detection

Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Audit SBOM/dependencies to find affected services.

Response actions

Concrete steps and command examples for SOC/SRE teams to execute in order

1
Identify exposure identify
```
Audit SBOM/dependencies for affected components.
```
資産台帳・SBOM・依存マニフェストで ca.uhn.hapi.fhir:org.hl7.fhir.dstu2 を使っているサービスとバージョンを洗い出す。
2
Apply patch patch
```
Upgrade ca.uhn.hapi.fhir:org.hl7.fhir.dstu2 to 6.9.7
```
ステージング環境で 6.9.7 に上げて回帰テスト → 本番反映。回帰テストはアプリの主要ハッピーパスを含めること。
3
Post-deployment verification verify
```
Confirm patched version is live in production
```
パッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。