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%, top 85% 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
Trending — 3 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%CVSS: 5.7Exploit: Elevated riskExposed: 0

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

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
5.7(medium)
EG Risk
42(Track)
EG Risk 42/100SSVC: 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 computed
Severity57% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
15%
KEV
Not listed

Published

August 19, 2026

Last Modified

September 1, 2026

Advisory Details (1)

Auto-updated Aug 19, 2026
Upstream fix merged — awaiting tagged release. 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.

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 17× in last 7d / 80× 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. 2026-09-18 23:40 UTCEG score recompute
  2. 2026-09-18 23:40 UTCGHSA enrichment
  3. 2026-09-18 19:27 UTCEPSS rescore
  4. 2026-09-18 00:11 UTCEG score recompute
  5. 2026-09-18 00:11 UTCGHSA enrichment
  6. 2026-09-16 23:14 UTCEG score recompute
  7. 2026-09-16 23:14 UTCGHSA enrichment
  8. 2026-09-16 14:07 UTCEPSS rescore
  9. 2026-09-16 05:14 UTCEPSS rescore
  10. 2026-09-15 23:44 UTCEG score recompute
  11. 2026-09-15 23:44 UTCGHSA enrichment
  12. 2026-09-14 23:55 UTCGHSA enrichment
  13. 2026-09-14 00:10 UTCEG score recompute
  14. 2026-09-14 00:10 UTCGHSA enrichment
  15. 2026-09-13 16:46 UTCEPSS rescore
  16. 2026-09-13 00:40 UTCEG score recompute
  17. 2026-09-13 00:40 UTCGHSA enrichment
  18. 2026-09-12 15:00 UTCEPSS rescore
  19. 2026-09-12 01:11 UTCEG score recompute
  20. 2026-09-12 01:11 UTCGHSA enrichment
  21. 2026-09-11 14:52 UTCEPSS rescore
  22. 2026-09-11 09:36 UTCEPSS rescore
  23. 2026-09-11 01:41 UTCEG score recompute
  24. 2026-09-11 01:41 UTCGHSA enrichment
  25. 2026-09-10 09:34 UTCEPSS rescore
Show 63 more
  1. 2026-09-10 02:12 UTCGHSA enrichment
  2. 2026-09-09 02:42 UTCEG score recompute
  3. 2026-09-09 02:42 UTCGHSA enrichment
  4. 2026-09-08 22:00 UTCEPSS rescore
  5. 2026-09-07 19:45 UTCEG score recompute
  6. 2026-09-07 19:45 UTCGHSA enrichment
  7. 2026-09-07 16:01 UTCEPSS rescore
  8. 2026-09-06 20:16 UTCEG score recompute
  9. 2026-09-06 20:16 UTCGHSA enrichment
  10. 2026-09-06 13:47 UTCEPSS rescore
  11. 2026-09-05 20:47 UTCEG score recompute
  12. 2026-09-05 20:47 UTCGHSA enrichment
  13. 2026-09-04 21:17 UTCEG score recompute
  14. 2026-09-04 21:17 UTCGHSA enrichment
  15. 2026-09-03 20:52 UTCGHSA enrichment
  16. 2026-09-02 21:22 UTCEG score recompute
  17. 2026-09-02 21:22 UTCGHSA enrichment
  18. 2026-09-02 14:11 UTCEPSS rescore
  19. 2026-09-01 21:23 UTCEG score recompute
  20. 2026-09-01 21:23 UTCGHSA enrichment
  21. 2026-09-01 13:53 UTCEPSS rescore
  22. 2026-09-01 10:19 UTCEG score recompute
  23. 2026-09-01 10:19 UTCGHSA enrichment
  24. 2026-09-01 04:39 UTCEPSS rescore
  25. 2026-08-31 10:45 UTCEG score recompute
  26. 2026-08-31 10:44 UTCGHSA enrichment
  27. 2026-08-30 19:17 UTCEPSS rescore
  28. 2026-08-30 10:50 UTCEG score recompute
  29. 2026-08-30 10:50 UTCGHSA enrichment
  30. 2026-08-30 01:22 UTCEPSS rescore
  31. 2026-08-29 11:19 UTCEG score recompute
  32. 2026-08-29 11:18 UTCGHSA enrichment
  33. 2026-08-28 21:41 UTCEPSS rescore
  34. 2026-08-28 11:46 UTCEG score recompute
  35. 2026-08-28 11:46 UTCGHSA enrichment
  36. 2026-08-27 14:25 UTCEPSS rescore
  37. 2026-08-27 12:17 UTCEG score recompute
  38. 2026-08-27 12:17 UTCGHSA enrichment
  39. 2026-08-26 14:46 UTCEPSS rescore
  40. 2026-08-26 12:48 UTCEG score recompute
  41. 2026-08-26 12:48 UTCGHSA enrichment
  42. 2026-08-25 13:48 UTCEPSS rescore
  43. 2026-08-25 13:19 UTCEG score recompute
  44. 2026-08-25 13:19 UTCGHSA enrichment
  45. 2026-08-24 13:50 UTCEG score recompute
  46. 2026-08-24 13:50 UTCGHSA enrichment
  47. 2026-08-23 14:21 UTCEG score recompute
  48. 2026-08-23 14:21 UTCGHSA enrichment
  49. 2026-08-23 00:19 UTCEPSS rescore
  50. 2026-08-22 14:52 UTCEG score recompute
  51. 2026-08-22 14:52 UTCGHSA enrichment
  52. 2026-08-21 23:49 UTCEPSS rescore
  53. 2026-08-21 15:23 UTCEG score recompute
  54. 2026-08-21 15:23 UTCGHSA enrichment
  55. 2026-08-20 22:55 UTCEPSS rescore
  56. 2026-08-20 15:54 UTCGHSA enrichment
  57. 2026-08-19 16:25 UTCEG score recompute
  58. 2026-08-19 16:25 UTCGHSA enrichment
  59. 2026-08-19 15:49 UTCEG score recompute
  60. 2026-08-19 15:48 UTCGHSA enrichment
  61. 2026-08-19 11:22 UTCEG score recompute
  62. 2026-08-19 10:23 UTCEG score recompute
  63. 2026-08-19 10:22 UTCMITRE cvelistV5first tracked

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 in the National Vulnerability Database 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% probability of exploitation in the next 30 days, which ranks it in the top 85.3% of all scored CVEs.
What is the CVSS score of CVE-2026-16440?
CVE-2026-16440 has a CVSS v3 base score of 5.7 (NVD).
How do I remediate CVE-2026-16440?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-16440, 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

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