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.
CVE-2026-45367
HIGHPre-NVD 7.57.5—Trending — 3 sources updated this week
EchelonGraph scoreMEDIUM confidence
This high-severity CVE scores 7.5 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.5%, top 61% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).
Triggered by: NVD CVSS baseline
Sources: epss, secondary
7.5
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
- High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.5Exploit: NoneExposed: 0
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 7.5
- EG Score
- 7.5(medium)
- EG Risk
- 49(Track)EG Risk 49/100SSVC: Track
EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).
How it’s computedSeverity75% × 45%Exploitation0% × 40%Automatability100% × 15%Action: Routine — remediate on your standard cadence. - EPSS
- 39.2%
- KEV
- Not listed
Published
May 18, 2026
Last Modified
July 18, 2026
Advisory Details (6)
Auto-updated Jul 16, 2026Patch available. Sources: github_commit, github_pr, github_release, github.
github Patch Available
ReDoS via FHIRPath matches()/replaceMatches() in FHIR Validator HTTP Endpoint · Advisory · hapifhir/org.hl7.fhir.core · GitHub
https://github.com/hapifhir/org.hl7.fhir.core/security/advisories/GHSA-3653-68v6-rq57github_release Patch Available
6.9.7
Patch available: hapifhir/org.hl7.fhir.core 6.9.7
https://github.com/hapifhir/org.hl7.fhir.core/releases/tag/6.9.7github_pr Patch Available
Add timeout in funcReplaceMatches in r4, r4b, r5
Patch available: hapifhir/org.hl7.fhir.core 6.9.9 (PR #2463 merged 2026-05-29)
https://github.com/hapifhir/org.hl7.fhir.core/pull/2463github_pr Patch Available
Add RegexTimeout utilities class
Patch available: hapifhir/org.hl7.fhir.core 6.9.7 (PR #2403 merged 2026-04-19)
https://github.com/hapifhir/org.hl7.fhir.core/pull/2403github_commit Patch Available
commit e08982d2b6f6 (hapifhir/org.hl7.fhir.core)
Patch available: hapifhir/org.hl7.fhir.core 6.9.9 (contains commit e08982d2b6f6)
https://github.com/hapifhir/org.hl7.fhir.core/commit/e08982d2b6f6dcd6c670a762d9cf999179fbe4edgithub_commit Patch Available
commit 275d015c680c (hapifhir/org.hl7.fhir.core)
Patch available: hapifhir/org.hl7.fhir.core 6.9.7 (contains commit 275d015c680c)
https://github.com/hapifhir/org.hl7.fhir.core/commit/275d015c680ce9f90cbe285596e50118e472bf24Vendor Advisories for CVE-2026-45367(1)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
Affected Packages
(8 across 1 ecosystem)
Maven(8)
| Package | Vulnerable range | Fixed in | Dependents |
|---|---|---|---|
| ca.uhn.hapi.fhir:org.hl7.fhir.dstu2 | 0.0.1 ... 6.9.6 (386 versions) | 6.9.7 | — |
| ca.uhn.hapi.fhir:org.hl7.fhir.dstu2016may | 0.0.1 ... 6.9.6 (386 versions) | 6.9.7 | — |
| ca.uhn.hapi.fhir:org.hl7.fhir.dstu3 | 0.0.1 ... 6.9.6 (386 versions) | 6.9.7 | — |
| ca.uhn.hapi.fhir:org.hl7.fhir.r4 | 0.0.1 ... 6.9.6 (386 versions) | 6.9.7 | — |
| ca.uhn.hapi.fhir:org.hl7.fhir.r4b | 5.6.100 ... 6.9.6 (259 versions) | 6.9.7 | — |
| ca.uhn.hapi.fhir:org.hl7.fhir.r5 | 0.0.1 ... 6.9.6 (386 versions) | 6.9.7 | — |
| ca.uhn.hapi.fhir:org.hl7.fhir.validation | 0.0.1 ... 6.9.6 (386 versions) | 6.9.7 | — |
| ca.uhn.hapi.fhir:org.hl7.fhir.validation.cli | 4.0.0 ... 5.0.0 (7 versions) | 6.9.7 | — |
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 8× in last 7d / 8× in last 30d)
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
- 2026-07-23 03:16 UTCEG score recompute
- 2026-07-22 14:08 UTCEPSS rescore
- 2026-07-21 15:24 UTCEPSS rescore
- 2026-07-20 17:08 UTCEPSS rescore
- 2026-07-19 14:31 UTCEPSS rescore
- 2026-07-19 02:29 UTCEPSS rescore
- 2026-07-18 10:04 UTCEPSS rescore
- 2026-07-18 00:29 UTCOSV refresh
- 2026-06-14 23:18 UTCEPSS rescore
- 2026-06-13 23:00 UTCEPSS rescore
- 2026-06-12 23:12 UTCEPSS rescore
- 2026-05-24 06:15 UTCEG score recompute
Related CVEs(same CWE)
Frequently asked(5)
What is CVE-2026-45367?
CVE-2026-45367 is a high vulnerability published on May 18, 2026. 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…
When was CVE-2026-45367 disclosed?
CVE-2026-45367 was first published in the National Vulnerability Database on May 18, 2026, with the most recent update on July 18, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-45367 actively exploited?
CVE-2026-45367 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 39.2% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-45367?
CVE-2026-45367 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-45367?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-45367, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.
Dependency Blast Radius
See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-45367
Is Your Infrastructure Affected by CVE-2026-45367?
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.