HAPI FHIR is a complete implementation of the HL7 FHIR standard for healthcare interoperability in Java. Prior to 6.9.9 and 6.9.4.2, all implementations of FHIRPathEngine accept arbitrary FHIRPath expressions and evaluate them without input validation, and the FHIRPath functions matches(), matchesFull(), and replaceMatches() pass user-controlled regular expressions to Java's Pattern.compile() and String.replaceAll() through an incomplete timeout utility. An attacker can send a resource containing an evil regex pattern that causes catastrophic backtracking, exhausting CPU resources and causing denial of service in the FHIR Validator HTTP endpoint and affected org.hl7.fhir.* modules. This issue is fixed in versions 6.9.9 and 6.9.4.2.
CVE-2026-49485
HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM confidence
This high-severity CVE scores 7.5 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.7%, top 52% 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: 1%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%Exploitation1% × 40%Automatability100% × 15%Action: Routine — remediate on your standard cadence. - EPSS
- 48.4%
- KEV
- Not listed
Published
July 9, 2026
Last Modified
July 23, 2026
Advisory Details (6)
Auto-updated Jul 17, 2026Patch available. Sources: github, github_pr, github_commit, github_release.
github_release Patch Available
6.9.9
Patch available: hapifhir/org.hl7.fhir.core 6.9.9
https://github.com/hapifhir/org.hl7.fhir.core/releases/tag/6.9.9github_release Patch Available
6.9.4.2
Patch available: hapifhir/org.hl7.fhir.core 6.9.4.2
https://github.com/hapifhir/org.hl7.fhir.core/releases/tag/6.9.4.2github_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 109c88837c03 (hapifhir/org.hl7.fhir.core)
Patch available: hapifhir/org.hl7.fhir.core 6.9.4.2 (contains commit 109c88837c03)
https://github.com/hapifhir/org.hl7.fhir.core/commit/109c88837c032ef399b2eb87ddde86692065cf41github_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 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-7cmj-v6x8-frvvVendor Advisories for CVE-2026-49485(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 ... 6.9.4.1 (385 versions) | 6.9.4.2 | — |
| ca.uhn.hapi.fhir:org.hl7.fhir.dstu2016may | 0.0.1 ... 6.9.4.1 (385 versions) | 6.9.4.2 | — |
| ca.uhn.hapi.fhir:org.hl7.fhir.dstu3 | 0.0.1 ... 6.9.4.1 (385 versions) | 6.9.4.2 | — |
| ca.uhn.hapi.fhir:org.hl7.fhir.r4 | 0.0.1 ... 6.9.4.1 (385 versions) | 6.9.4.2 | — |
| ca.uhn.hapi.fhir:org.hl7.fhir.r4b | 5.6.100 ... 6.9.4.1 (258 versions) | 6.9.4.2 | — |
| ca.uhn.hapi.fhir:org.hl7.fhir.r5 | 0.0.1 ... 6.9.4.1 (385 versions) | 6.9.4.2 | — |
| ca.uhn.hapi.fhir:org.hl7.fhir.validation | 0.0.1 ... 6.9.4.1 (385 versions) | 6.9.4.2 | — |
| ca.uhn.hapi.fhir:org.hl7.fhir.validation.cli | 4.0.0 ... 5.0.0 (7 versions) | 6.9.4.2 | — |
Weakness Classification(2)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 9× in last 7d / 10× 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 14:18 UTCEPSS rescore
- 2026-07-23 03:18 UTCEG score recompute
- 2026-07-22 14:08 UTCEPSS rescore
- 2026-07-21 15:25 UTCEPSS rescore
- 2026-07-20 17:08 UTCEPSS rescore
- 2026-07-19 14:31 UTCEPSS rescore
- 2026-07-19 14:31 UTCEPSS rescore
- 2026-07-19 03:42 UTCEG score recompute
- 2026-07-19 02:29 UTCEPSS rescore
- 2026-07-09 13:45 UTCEG score recompute
Related CVEs(same CWE)
Same CWE
10 shownCWE-400
Frequently asked(5)
What is CVE-2026-49485?
CVE-2026-49485 is a high vulnerability published on July 9, 2026. HAPI FHIR is a complete implementation of the HL7 FHIR standard for healthcare interoperability in Java. Prior to 6.9.9 and 6.9.4.2, all implementations of FHIRPathEngine accept arbitrary FHIRPath expressions and evaluate them without input validation, and the FHIRPath functions matches(),…
When was CVE-2026-49485 disclosed?
CVE-2026-49485 was first published in the National Vulnerability Database on July 9, 2026, with the most recent update on July 23, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-49485 actively exploited?
CVE-2026-49485 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 48.4% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-49485?
CVE-2026-49485 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-49485?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-49485, 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-2026-49485
Is Your Infrastructure Affected by CVE-2026-49485?
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