CVE-2026-64609

CRITICALPre-NVD 9.19.1—
EchelonGraph scoreMEDIUM confidence

Score 9.1 from GitHub Security Advisory (severity: CRITICAL) published 2026-07-21. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 9.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this week
9.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 9.1Exploit: None knownExposed: 0

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

Out-of-bounds read via sun.misc.Unsafe in Apache Fory. When out-of-band zero-copy deserialization is used, readAlignedVarUint() can read beyond the bounds of the underlying buffer. Out-of-band zero-copy deserialization is an opt-in feature; applications that do not use it are not affected.

This issue affects Apache Fory (formerly Apache Fury): from 0.5.0 before 1.4.0. Versions before 0.11.0 were published under the Maven coordinates org.apache.fury:fury-core.

Users are recommended to upgrade to version 1.4.0, which fixes the issue.

CVSS v3
9.1
EG Score
9.1(medium)
EG Risk
56(Track)
EG Risk 56/100SSVC: 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
Severity91% × 45%
Exploitation1% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
53%
KEV
Not listed

Published

July 21, 2026

Last Modified

July 27, 2026

Advisory Details (2)

Auto-updated Aug 29, 2026
No patch confirmed yet.
generic

oss-security - CVE-2026-64609: Apache Fory: Out-of-Bounds Read via sun.misc.Unsafe in zero-copy java deserialization

http://www.openwall.com/lists/oss-security/2026/07/21/6
generic
https://lists.apache.org/thread/rdv22ks3b0cxh0r52w3ghxgkxqso3f1b

Vendor Advisories for CVE-2026-64609(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 36× in last 7d / 217× 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 338 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-64609?
CVE-2026-64609 is a critical vulnerability published on July 21, 2026. Out-of-bounds read via sun.misc.Unsafe in Apache Fory. When out-of-band zero-copy deserialization is used, readAlignedVarUint() can read beyond the bounds of the underlying buffer. Out-of-band zero-copy deserialization is an opt-in feature; applications that do not use it are not affected. This…
When was CVE-2026-64609 disclosed?
CVE-2026-64609 was first published in the National Vulnerability Database on July 21, 2026, with the most recent update on July 27, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-64609 actively exploited?
CVE-2026-64609 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 47.1% of all scored CVEs.
What is the CVSS score of CVE-2026-64609?
CVE-2026-64609 has a CVSS v3.1 base score of 9.1 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-64609?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-64609, 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

Explore the affected products and dependency analysis for CVE-2026-64609

Explore →

Is Your Infrastructure Affected by CVE-2026-64609?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs