CVE-2026-62295

HIGHPre-NVD 7.57.5
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

This high-severity CVE scores 7.5 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.5% (40th percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from a secondary CVSS source
Sources: EPSS, a secondary CVSS source
Elevated
7.5EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • CISA's Vulnrichment rates exploitation as PoC; EchelonGraph holds no exploit-code reference for it
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 7.5Exploit: No code on recordExposed services: Not assessed

A fix is available — apply it.

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.

CVSS v3
7.5
EG Score
7.5HIGHmedium confidence
EG Risk
65
EG Risk 65/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity75% × 45%
Impact severity (EG Severity): CVSS 7.5 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation40% × 40%
EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.
Automatability100% × 15%
CISA's SSVC Automatable value: yes (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).
Exploitation public PoC (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
0.5%
EPSS %ILE
40th
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (7.5): severity, escalated by confirmed exploitation. This CVE's 7.5 is its impact severity (EG Severity), not escalated.

EG Severity
7.5 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.a secondary CVSS source · CVSS v3.0 or v3.1
EG Likelihood
0.5% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-19). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at low or medium mission impact; Attend at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; 60 days if it is not.Each input and its source: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation public PoC (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; 60 days if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

August 7, 2026

Last Modified

September 9, 2026

Advisory Details (2)

Auto-updated Aug 7, 2026
Patch available. Sources: github, github_commit.
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
GitHub advisoryMentions a patch (unverified)

JSON utility 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-2cq7-hg49-56gc

Weakness Classification(3)

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

Data Freshness Timeline

(refreshed 10× in last 7d / 43× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 100 of 117 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 17 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-20 09:22 UTCEG score recompute
  2. 2026-10-19 16:32 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  3. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.5% · 40th percentile
  4. 2026-10-18 03:24 UTCEG score recompute
  5. 2026-10-17 16:35 UTCEPSS rescoreEPSS 0.5% · 40th percentile
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  16. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.5% · 40th percentile
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  18. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.5% · 40th percentile
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  22. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.5% · 39th percentile
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  1. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  2. 2026-10-03 00:59 UTCEG score recompute
  3. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  4. 2026-10-02 09:31 UTCEG score recompute
  5. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  6. 2026-09-30 22:54 UTCEG score recompute
  7. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.5% · 39th percentile
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  9. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  10. 2026-09-27 17:08 UTCEG score recompute
  11. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.5% · 39th percentile
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  14. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  15. 2026-09-23 00:50 UTCEG score recompute
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  18. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  19. 2026-09-19 17:29 UTCEG score recompute
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  21. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.3% · 27th percentile
  22. 2026-09-18 03:12 UTCEG score recompute
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  24. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  25. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  26. 2026-09-15 14:45 UTCEG score recompute
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  30. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  31. 2026-09-11 14:22 UTCEG score recompute
  32. 2026-09-11 09:37 UTCEPSS rescoreEPSS 0.3% · 26th percentile
  33. 2026-09-10 12:40 UTCEG score recompute
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  35. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  36. 2026-09-07 17:42 UTCEG score recompute
  37. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.3% · 20th percentile
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  40. 2026-09-05 16:10 UTCEG score recompute
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  43. 2026-09-04 05:07 UTCEPSS rescoreEPSS 0.3% · 19th percentile
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  47. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.3% · 19th percentile
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  49. 2026-08-30 22:26 UTCEG score recompute
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  52. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.3% · 19th percentile
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  54. 2026-08-28 21:42 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  55. 2026-08-27 21:00 UTCEG score recompute
  56. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  57. 2026-08-26 20:56 UTCEG score recompute
  58. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.3% · 19th percentile
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  60. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  61. 2026-08-24 20:40 UTCEG score recompute
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  63. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.3% · 20th percentile
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  71. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.3% · 20th percentile
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  74. 2026-08-16 19:32 UTCEG score recompute
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Frequently asked(5)

What is CVE-2026-62295?
CVE-2026-62295 is a high-severity vulnerability; its CVE record was 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, 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,…
When was the CVE record for CVE-2026-62295 published?
The CVE record for CVE-2026-62295 was published on August 7, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of September 9, 2026; the record at its source may have been updated since.
Is CVE-2026-62295 actively exploited?
CVE-2026-62295 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (40th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-62295?
CVE-2026-62295 has a CVSS base score of 7.5 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-62295?
A fix for CVE-2026-62295 is available: update to the fixed version the vendor names in its advisory.

Dependency Blast Radius

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