CVE-2026-41586

CRITICALNVD 9.39.3—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.3 under NVD CVSS v3. EPSS exploit probability: 0.4%, top 67% 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, nvd
Elevated
9.3
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 9.3Exploit: NoneExposed: 0

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

Hyperledger Fabric is an enterprise-grade permissioned distributed ledger framework for developing solutions and applications. From versions 1.0.0 to 2.2.26, Channel.java implements readObject() and exposes deSerializeChannel() which call ObjectInputStream.readObject() on untrusted byte arrays without configuring an ObjectInputFilter. This is a classic Java deserialization RCE pattern. At time of publication, there are no publicly available patches.

CVSS v3
9.3
EG Score
9.3(medium)
EPSS
33.1%
KEV
Not listed

Published

May 7, 2026

Last Modified

May 7, 2026

Advisory Details (2)

Auto-updated May 7, 2026
🔬 Proof of concept available. Patch available. Sources: github.
generic

Getting started - Fabric Gateway client API

https://hyperledger.github.io/fabric-gateway
github Patch Available🟡 PoC Available

ObjectInputStream.readObject() without ObjectInputFilter in fabric-sdk-java allows Java deserialization RCE · Advisory · hyperledger/fabric · GitHub

https://github.com/hyperledger/fabric/security/advisories/GHSA-prf8-cf2x-rhx7

Vendor Advisories for CVE-2026-41586(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 / EcosystemFixed in / PatchReleasedSource
mavenorg.hyperledger.fabric-sdk-java:fabric-sdk-java—ghsa

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.

Affected Packages

(1 across 1 ecosystem)
Maven(1)
PackageVulnerable rangeFixed inDependents
org.hyperledger.fabric-sdk-java:fabric-sdk-java1.0.0 ... 2.2.9 (58 versions)——

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 9× in last 7d / 59× 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 241 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2026-41586?
CVE-2026-41586 is a critical vulnerability published on May 7, 2026. Hyperledger Fabric is an enterprise-grade permissioned distributed ledger framework for developing solutions and applications. From versions 1.0.0 to 2.2.26, Channel.java implements readObject() and exposes deSerializeChannel() which call ObjectInputStream.readObject() on untrusted byte arrays…
When was CVE-2026-41586 disclosed?
CVE-2026-41586 was first published in the National Vulnerability Database on May 7, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-41586 actively exploited?
CVE-2026-41586 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 33.1% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-41586?
CVE-2026-41586 has a CVSS v3 base score of 9.3 (NVD).
How do I remediate CVE-2026-41586?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-41586, 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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