CVE-2026-64606

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-07-21. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this week
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 9.8Exploit: None knownExposed: 0

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

Deserialization of untrusted data vulnerability that may allow class-registration checks to be bypassed during Java lambda deserialization. Only lambda capture class is affected

This issue affects Apache Fory: from before 1.4.0.

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

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
59(Track)
EG Risk 59/100SSVC: 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
Severity98% × 45%
Exploitation1% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
52%
KEV
Not listed

Published

July 21, 2026

Last Modified

July 27, 2026

Advisory Details (2)

Auto-updated Sep 7, 2026
No patch confirmed yet.
generic

oss-security - CVE-2026-64606: Apache Fory: Class-registration bypass through an auto-admitted SerializedLambda capturing interface

http://www.openwall.com/lists/oss-security/2026/07/21/4
generic
https://lists.apache.org/thread/py6fbvm9nk1gxdd85rbzbozwzfh0jrsc

Vendor Advisories for CVE-2026-64606(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 24× in last 7d / 152× 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 357 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-64606?
CVE-2026-64606 is a critical vulnerability published on July 21, 2026. Deserialization of untrusted data vulnerability that may allow class-registration checks to be bypassed during Java lambda deserialization. Only lambda capture class is affected This issue affects Apache Fory: from before 1.4.0. Users are recommended to upgrade to version 1.4.0, which fixes the…
When was CVE-2026-64606 disclosed?
CVE-2026-64606 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-2026-64606 actively exploited?
CVE-2026-64606 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 48.1% of all scored CVEs.
What is the CVSS score of CVE-2026-64606?
CVE-2026-64606 has a CVSS v3.1 base score of 9.8 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-64606?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-64606, 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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