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
Trending — 4 sources updated this weekElevated
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
43%
KEV
Not listed

Published

May 7, 2026

Last Modified

August 25, 2026

Advisory Details (2)

Auto-updated Aug 25, 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 10× in last 7d / 104× 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 281 total refreshes for this CVE.

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

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 57.4% 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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