CVE-2026-62296

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: 0.3%, top 80% 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
Elevated
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.5Exploit: Elevated riskExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

HAPI FHIR is a complete implementation of the HL7 FHIR standard for healthcare interoperability in Java. Prior to 6.9.11, XhtmlParser.java imposes no maximum element nesting depth, so a deeply nested text.div narrative triggers unbounded recursion between parseElementInner() and parseElement(), raising a StackOverflowError. An attacker who can submit FHIR resources containing such narratives can thus crash a parsing or validation worker thread, affecting validator services and any application that parses attacker-supplied FHIR JSON or XML. This issue is fixed in version 6.9.11.

CVSS v3
7.5
EG Score
7.5(medium)
EG Risk
65(Attend)
EG Risk 65/100SSVC: Attend

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 computed
Severity75% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
0%
EPSS %ILE
20%
KEV
Not listed

Published

August 7, 2026

Last Modified

August 10, 2026

Advisory Details (2)

Auto-updated Aug 7, 2026
🔬 Proof of concept available. Patch available. Sources: github_commit, github.
github Patch Available🟡 PoC Available

XHTML narrative parser unbounded recursion causes StackOverflow denial of service · Advisory · hapifhir/org.hl7.fhir.core · GitHub

https://github.com/hapifhir/org.hl7.fhir.core/security/advisories/GHSA-5v24-q6x8-hc38
github_commit Patch Available

commit 396f44750040 (hapifhir/org.hl7.fhir.core)

Patch available: hapifhir/org.hl7.fhir.core 6.9.11 (contains commit 396f44750040)

https://github.com/hapifhir/org.hl7.fhir.core/commit/396f447500407693d6ae1e64db59782862ca7506

Weakness Classification(3)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 11× in last 7d / 43× 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.

  1. 2026-08-30 01:22 UTCEPSS rescore
  2. 2026-08-29 10:21 UTCEG score recompute
  3. 2026-08-28 21:42 UTCEPSS rescore
  4. 2026-08-27 19:48 UTCEG score recompute
  5. 2026-08-27 14:25 UTCEPSS rescore
  6. 2026-08-26 18:58 UTCEG score recompute
  7. 2026-08-26 14:46 UTCEPSS rescore
  8. 2026-08-25 19:07 UTCEG score recompute
  9. 2026-08-25 13:49 UTCEPSS rescore
  10. 2026-08-24 19:35 UTCEG score recompute
  11. 2026-08-23 08:18 UTCEG score recompute
  12. 2026-08-23 00:19 UTCEPSS rescore
  13. 2026-08-22 08:46 UTCEG score recompute
  14. 2026-08-21 23:49 UTCEPSS rescore
  15. 2026-08-21 09:14 UTCEG score recompute
  16. 2026-08-20 22:55 UTCEPSS rescore
  17. 2026-08-19 21:58 UTCEG score recompute
  18. 2026-08-19 17:04 UTCEPSS rescore
  19. 2026-08-18 22:25 UTCEG score recompute
  20. 2026-08-18 13:48 UTCEPSS rescore
  21. 2026-08-17 22:54 UTCEG score recompute
  22. 2026-08-17 13:47 UTCEPSS rescore
  23. 2026-08-16 23:23 UTCEG score recompute
  24. 2026-08-16 14:56 UTCEPSS rescore
  25. 2026-08-16 11:37 UTCEG score recompute
Show 18 more
  1. 2026-08-15 12:06 UTCEG score recompute
  2. 2026-08-15 01:30 UTCEPSS rescore
  3. 2026-08-14 00:49 UTCEG score recompute
  4. 2026-08-13 22:00 UTCEPSS rescore
  5. 2026-08-13 01:17 UTCEG score recompute
  6. 2026-08-12 13:51 UTCEPSS rescore
  7. 2026-08-11 14:01 UTCEG score recompute
  8. 2026-08-11 02:15 UTCEG score recompute
  9. 2026-08-11 00:00 UTCEPSS rescore
  10. 2026-08-10 14:30 UTCEG score recompute
  11. 2026-08-10 13:37 UTCEG score recompute
  12. 2026-08-09 19:31 UTCEG score recompute
  13. 2026-08-09 13:47 UTCEPSS rescore
  14. 2026-08-08 20:01 UTCEG score recompute
  15. 2026-08-08 16:37 UTCEPSS rescore
  16. 2026-08-07 20:30 UTCEG score recompute
  17. 2026-08-07 20:12 UTCEG score recompute
  18. 2026-08-07 20:12 UTCMITRE cvelistV5first tracked

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Frequently asked(5)

What is CVE-2026-62296?
CVE-2026-62296 is a high vulnerability published on August 7, 2026. HAPI FHIR is a complete implementation of the HL7 FHIR standard for healthcare interoperability in Java. Prior to 6.9.11, XhtmlParser.java imposes no maximum element nesting depth, so a deeply nested text.div narrative triggers unbounded recursion between parseElementInner() and parseElement(),…
When was CVE-2026-62296 disclosed?
CVE-2026-62296 was first published in the National Vulnerability Database on August 7, 2026, with the most recent update on August 10, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-62296 actively exploited?
CVE-2026-62296 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 80.1% of all scored CVEs.
What is the CVSS score of CVE-2026-62296?
CVE-2026-62296 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-62296?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-62296, 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.

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