CVE-2026-16440

MEDIUMPre-NVD 5.75.7—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.7 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.2% (13th percentile of EPSS-scored CVEs). 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
Trending — 4 sources updated this weekElevated
5.7EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 5.7Exploit: Elevated riskExposed services: Not assessed

A fix is available — apply it.

In Eclipse OpenJ9 versions up to 0.60, a crafted .class file with deeply nested annotations causes a segmentation fault.

CVSS v3
5.7
EG Score
5.7MEDIUMmedium confidence
EG Risk
42
EG Risk 42/100CISA SSVC

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
Severity57% × 45%
Exploitation40% × 40%
Automatability0% × 15%
CISA SSVC: Track at low or medium mission impact; Track* at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.2%
EPSS %ILE
13th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track* at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines.

Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

August 19, 2026

Last Modified

September 1, 2026

Advisory Details (1)

Auto-updated Aug 19, 2026
Patch available. Sources: github_pr.
github_pr

Add stackoverflow checks to class file parsing

Fix merged in eclipse-openj9/openj9 PR #24572 on 2026-08-18 — awaiting tagged release

https://github.com/eclipse-openj9/openj9/pull/24572

Vendor Advisories for CVE-2026-16440(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(1)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
redhatjava-1.8.0-ibm-1:1.8.0.8.71-1.el8_102026-09-23redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(1)

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

All Vendor Advisories

(1)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 17× in last 7d / 73× 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.

Showing the most recent 100 of 124 total refreshes for this CVE.

  1. 2026-10-04 23:21 UTCEPSS rescore
  2. 2026-10-04 16:29 UTCGHSA enrichment
  3. 2026-10-03 17:00 UTCEG score recompute
  4. 2026-10-03 17:00 UTCGHSA enrichment
  5. 2026-10-03 14:25 UTCEPSS rescore
  6. 2026-10-02 08:02 UTCEG score recompute
  7. 2026-10-02 08:02 UTCGHSA enrichment
  8. 2026-10-01 19:49 UTCEPSS rescore
  9. 2026-10-01 08:26 UTCEG score recompute
  10. 2026-10-01 08:26 UTCGHSA enrichment
  11. 2026-09-30 15:02 UTCEPSS rescore
  12. 2026-09-30 08:52 UTCEG score recompute
  13. 2026-09-30 08:52 UTCGHSA enrichment
  14. 2026-09-29 15:20 UTCEPSS rescore
  15. 2026-09-29 06:17 UTCEG score recompute
  16. 2026-09-29 06:17 UTCVendor advisory
  17. 2026-09-29 06:17 UTCGHSA enrichment
  18. 2026-09-28 13:51 UTCEPSS rescore
  19. 2026-09-28 06:48 UTCVendor advisory
  20. 2026-09-28 06:48 UTCGHSA enrichment
  21. 2026-09-27 07:12 UTCEG score recompute
  22. 2026-09-27 07:12 UTCVendor advisory
  23. 2026-09-27 07:12 UTCGHSA enrichment
  24. 2026-09-26 15:58 UTCEPSS rescore
  25. 2026-09-25 00:56 UTCEG score recompute
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  1. 2026-09-25 00:56 UTCGHSA enrichment
  2. 2026-09-23 21:07 UTCEG score recompute
  3. 2026-09-23 21:07 UTCGHSA enrichment
  4. 2026-09-22 21:37 UTCEG score recompute
  5. 2026-09-22 21:37 UTCGHSA enrichment
  6. 2026-09-21 22:08 UTCEG score recompute
  7. 2026-09-21 22:08 UTCGHSA enrichment
  8. 2026-09-20 22:40 UTCEG score recompute
  9. 2026-09-20 22:40 UTCGHSA enrichment
  10. 2026-09-19 23:10 UTCEG score recompute
  11. 2026-09-19 23:10 UTCGHSA enrichment
  12. 2026-09-18 23:40 UTCEG score recompute
  13. 2026-09-18 23:40 UTCGHSA enrichment
  14. 2026-09-18 19:27 UTCEPSS rescore
  15. 2026-09-18 00:11 UTCEG score recompute
  16. 2026-09-18 00:11 UTCGHSA enrichment
  17. 2026-09-16 23:14 UTCEG score recompute
  18. 2026-09-16 23:14 UTCGHSA enrichment
  19. 2026-09-16 14:07 UTCEPSS rescore
  20. 2026-09-16 05:14 UTCEPSS rescore
  21. 2026-09-15 23:44 UTCEG score recompute
  22. 2026-09-15 23:44 UTCGHSA enrichment
  23. 2026-09-14 23:55 UTCGHSA enrichment
  24. 2026-09-14 00:10 UTCEG score recompute
  25. 2026-09-14 00:10 UTCGHSA enrichment
  26. 2026-09-13 16:46 UTCEPSS rescore
  27. 2026-09-13 00:40 UTCEG score recompute
  28. 2026-09-13 00:40 UTCGHSA enrichment
  29. 2026-09-12 15:00 UTCEPSS rescore
  30. 2026-09-12 01:11 UTCEG score recompute
  31. 2026-09-12 01:11 UTCGHSA enrichment
  32. 2026-09-11 14:52 UTCEPSS rescore
  33. 2026-09-11 09:36 UTCEPSS rescore
  34. 2026-09-11 01:41 UTCEG score recompute
  35. 2026-09-11 01:41 UTCGHSA enrichment
  36. 2026-09-10 09:34 UTCEPSS rescore
  37. 2026-09-10 02:12 UTCGHSA enrichment
  38. 2026-09-09 02:42 UTCEG score recompute
  39. 2026-09-09 02:42 UTCGHSA enrichment
  40. 2026-09-08 22:00 UTCEPSS rescore
  41. 2026-09-07 19:45 UTCEG score recompute
  42. 2026-09-07 19:45 UTCGHSA enrichment
  43. 2026-09-07 16:01 UTCEPSS rescore
  44. 2026-09-06 20:16 UTCEG score recompute
  45. 2026-09-06 20:16 UTCGHSA enrichment
  46. 2026-09-06 13:47 UTCEPSS rescore
  47. 2026-09-05 20:47 UTCEG score recompute
  48. 2026-09-05 20:47 UTCGHSA enrichment
  49. 2026-09-04 21:17 UTCEG score recompute
  50. 2026-09-04 21:17 UTCGHSA enrichment
  51. 2026-09-03 20:52 UTCGHSA enrichment
  52. 2026-09-02 21:22 UTCEG score recompute
  53. 2026-09-02 21:22 UTCGHSA enrichment
  54. 2026-09-02 14:11 UTCEPSS rescore
  55. 2026-09-01 21:23 UTCEG score recompute
  56. 2026-09-01 21:23 UTCGHSA enrichment
  57. 2026-09-01 13:53 UTCEPSS rescore
  58. 2026-09-01 10:19 UTCEG score recompute
  59. 2026-09-01 10:19 UTCGHSA enrichment
  60. 2026-09-01 04:39 UTCEPSS rescore
  61. 2026-08-31 10:45 UTCEG score recompute
  62. 2026-08-31 10:44 UTCGHSA enrichment
  63. 2026-08-30 19:17 UTCEPSS rescore
  64. 2026-08-30 10:50 UTCEG score recompute
  65. 2026-08-30 10:50 UTCGHSA enrichment
  66. 2026-08-30 01:22 UTCEPSS rescore
  67. 2026-08-29 11:19 UTCEG score recompute
  68. 2026-08-29 11:18 UTCGHSA enrichment
  69. 2026-08-28 21:41 UTCEPSS rescore
  70. 2026-08-28 11:46 UTCEG score recompute
  71. 2026-08-28 11:46 UTCGHSA enrichment
  72. 2026-08-27 14:25 UTCEPSS rescore
  73. 2026-08-27 12:17 UTCEG score recompute
  74. 2026-08-27 12:17 UTCGHSA enrichment
  75. 2026-08-26 14:46 UTCEPSS rescore

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Frequently asked(5)

What is CVE-2026-16440?
CVE-2026-16440 is a medium vulnerability published on August 19, 2026. In Eclipse OpenJ9 versions up to 0.60, a crafted .class file with deeply nested annotations causes a segmentation fault.
When was CVE-2026-16440 disclosed?
CVE-2026-16440 was first published on August 19, 2026, with the most recent update on September 1, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-16440 actively exploited?
CVE-2026-16440 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (13th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-16440?
CVE-2026-16440 has a CVSS base score of 5.7 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-16440?
A fix for CVE-2026-16440 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-16440 are linked in the Vendor Advisories panel on this page.

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