CVE-2026-41586

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.8 under NVD CVSS v3. EPSS exploit probability: 0.4%, top 66% 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
9.8EG
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: Elevated riskExposed: 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
9.8
EG Score
9.8(medium)
EG Risk
75(Attend)
EG Risk 75/100SSVC: Attend

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%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
1%
EPSS %ILE
44%
KEV
Not listed

Published

May 7, 2026

Last Modified

August 25, 2026

Advisory Details (2)

Auto-updated Sep 16, 2026
🔬 Proof of concept available. Patch available. Sources: github.
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
generic

Getting started - Fabric Gateway client API

https://hyperledger.github.io/fabric-gateway

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 4× in last 7d / 28× 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 301 total refreshes for this CVE.

  1. 2026-09-18 19:28 UTCEPSS rescore
  2. 2026-09-17 19:31 UTCEPSS rescore
  3. 2026-09-16 14:08 UTCEPSS rescore
  4. 2026-09-16 05:15 UTCEPSS rescore
  5. 2026-09-13 16:47 UTCEPSS rescore
  6. 2026-09-12 15:01 UTCEPSS rescore
  7. 2026-09-11 14:53 UTCEPSS rescore
  8. 2026-09-11 09:37 UTCEPSS rescore
  9. 2026-09-10 09:34 UTCEPSS rescore
  10. 2026-09-08 22:00 UTCEPSS rescore
  11. 2026-09-07 16:01 UTCEPSS rescore
  12. 2026-09-06 13:47 UTCEPSS rescore
  13. 2026-09-04 05:06 UTCEPSS rescore
  14. 2026-09-02 14:12 UTCEPSS rescore
  15. 2026-09-01 13:53 UTCEPSS rescore
  16. 2026-09-01 04:39 UTCEPSS rescore
  17. 2026-08-30 19:17 UTCEPSS rescore
  18. 2026-08-30 01:22 UTCEPSS rescore
  19. 2026-08-28 21:41 UTCEPSS rescore
  20. 2026-08-27 14:25 UTCEPSS rescore
  21. 2026-08-26 14:46 UTCEPSS rescore
  22. 2026-08-25 16:56 UTCEG score recompute▲ 0.50
  23. 2026-08-25 16:56 UTCGHSA enrichment
  24. 2026-08-25 16:53 UTCNVD updateCVSS v3 → 9.8
  25. 2026-08-25 13:49 UTCEPSS rescore
Show 75 more
  1. 2026-08-23 19:38 UTCEG score recompute
  2. 2026-08-23 19:38 UTCGHSA enrichment
  3. 2026-08-23 00:19 UTCEPSS rescore
  4. 2026-08-21 23:49 UTCEPSS rescore
  5. 2026-08-20 22:55 UTCEPSS rescore
  6. 2026-08-19 17:03 UTCEPSS rescore
  7. 2026-08-18 13:48 UTCEPSS rescore
  8. 2026-08-17 13:47 UTCEPSS rescore
  9. 2026-08-17 12:48 UTCEG score recompute
  10. 2026-08-17 12:48 UTCGHSA enrichment
  11. 2026-08-16 14:56 UTCEPSS rescore
  12. 2026-08-16 12:13 UTCGHSA enrichment
  13. 2026-08-16 08:29 UTCGHSA enrichment
  14. 2026-08-16 04:45 UTCEG score recompute
  15. 2026-08-16 04:45 UTCGHSA enrichment
  16. 2026-08-16 02:14 UTCEPSS rescore
  17. 2026-08-15 01:42 UTCEG score recompute
  18. 2026-08-15 01:42 UTCGHSA enrichment
  19. 2026-08-15 01:30 UTCEPSS rescore
  20. 2026-08-14 21:58 UTCGHSA enrichment
  21. 2026-08-14 18:14 UTCGHSA enrichment
  22. 2026-08-14 14:30 UTCGHSA enrichment
  23. 2026-08-14 10:47 UTCGHSA enrichment
  24. 2026-08-14 07:03 UTCGHSA enrichment
  25. 2026-08-14 03:20 UTCEG score recompute
  26. 2026-08-14 03:20 UTCGHSA enrichment
  27. 2026-08-13 22:00 UTCEPSS rescore
  28. 2026-08-13 08:20 UTCGHSA enrichment
  29. 2026-08-13 04:08 UTCGHSA enrichment
  30. 2026-08-13 00:24 UTCGHSA enrichment
  31. 2026-08-12 20:38 UTCGHSA enrichment
  32. 2026-08-12 16:54 UTCEG score recompute
  33. 2026-08-12 16:54 UTCGHSA enrichment
  34. 2026-08-12 13:51 UTCEPSS rescore
  35. 2026-08-11 23:26 UTCGHSA enrichment
  36. 2026-08-11 19:43 UTCGHSA enrichment
  37. 2026-08-11 15:57 UTCEG score recompute
  38. 2026-08-11 15:57 UTCGHSA enrichment
  39. 2026-08-11 13:43 UTCEPSS rescore
  40. 2026-08-11 08:53 UTCGHSA enrichment
  41. 2026-08-11 05:10 UTCGHSA enrichment
  42. 2026-08-11 01:26 UTCEG score recompute
  43. 2026-08-11 01:26 UTCGHSA enrichment
  44. 2026-08-11 00:00 UTCEPSS rescore
  45. 2026-08-10 12:44 UTCGHSA enrichment
  46. 2026-08-10 08:53 UTCGHSA enrichment
  47. 2026-08-10 05:09 UTCGHSA enrichment
  48. 2026-08-10 01:26 UTCGHSA enrichment
  49. 2026-08-09 21:41 UTCGHSA enrichment
  50. 2026-08-09 17:57 UTCGHSA enrichment
  51. 2026-08-09 14:14 UTCEG score recompute
  52. 2026-08-09 14:14 UTCGHSA enrichment
  53. 2026-08-09 13:46 UTCEPSS rescore
  54. 2026-08-09 10:30 UTCGHSA enrichment
  55. 2026-08-09 06:14 UTCGHSA enrichment
  56. 2026-08-09 02:30 UTCEG score recompute
  57. 2026-08-09 02:30 UTCGHSA enrichment
  58. 2026-08-08 16:37 UTCEPSS rescore
  59. 2026-08-08 12:37 UTCGHSA enrichment
  60. 2026-08-08 08:53 UTCGHSA enrichment
  61. 2026-08-08 05:09 UTCGHSA enrichment
  62. 2026-08-08 01:26 UTCGHSA enrichment
  63. 2026-08-07 21:42 UTCGHSA enrichment
  64. 2026-08-07 17:58 UTCEG score recompute
  65. 2026-08-07 17:58 UTCGHSA enrichment
  66. 2026-08-07 14:15 UTCGHSA enrichment
  67. 2026-08-07 10:29 UTCGHSA enrichment
  68. 2026-08-07 01:50 UTCGHSA enrichment
  69. 2026-08-06 20:42 UTCGHSA enrichment
  70. 2026-08-06 16:54 UTCEG score recompute
  71. 2026-08-06 16:54 UTCGHSA enrichment
  72. 2026-08-06 13:46 UTCEPSS rescore
  73. 2026-08-06 13:10 UTCGHSA enrichment
  74. 2026-08-06 09:25 UTCGHSA enrichment
  75. 2026-08-06 05:42 UTCGHSA enrichment

Related CVEs(same CWE)

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, with the most recent update on August 25, 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 1% probability of exploitation in the next 30 days, which ranks it in the top 56.2% of all scored CVEs.
What is the CVSS score of CVE-2026-41586?
CVE-2026-41586 has a CVSS v3 base score of 9.8 (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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