CVE-2026-41586

CRITICALNVD 9.89.8
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to NVD's CVSS score.

This critical-severity CVE scores 9.8 under NVD CVSS v3. EPSS exploit probability: 0.5% (45th percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from NVD CVSS v3
Sources: EPSS, NVD CVSS v3
Elevated

Also known asEUVD-2026-28316 (ENISA EUVD) · GHSA-prf8-cf2x-rhx7 (GitHub Security Advisories)Source: ENISA EUVD

9.8EG
EchelonGraph verdictPlan mitigationNo fix is confirmed yet: check the vendor's advisory for a fixed release; until one is applied, restrict network exposure of the affected system or apply the vendor's mitigation on your normal schedule at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • CISA's Vulnrichment rates exploitation as PoC; EchelonGraph holds no exploit-code reference for it
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 9.8Exploit: No code on recordExposed services: Not assessed

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

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
9.8CRITICALmedium confidence
EG Risk
75
EG Risk 75/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity98% × 45%
Impact severity (EG Severity): CVSS 9.8 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation40% × 40%
EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.
Automatability100% × 15%
CISA's SSVC Automatable value: yes (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low, Track* at medium and Attend at high mission impact.
Exploitation public PoC (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: No fix is confirmed yet. Check the vendor's advisory for a fixed release; until one is applied, restrict network exposure of the affected system or apply the vendor's mitigation on your normal schedule at low or medium mission impact and sooner than that at high.
EPSS PROB
0.5%
EPSS %ILE
45th
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (9.8): severity, escalated by confirmed exploitation. This CVE's 9.8 is its impact severity (EG Severity), not escalated.

EG Severity
9.8 CRITICALCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.NVD CVSS v3 · CVSS v3.0 or v3.1
EG Likelihood
0.5% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-11-12). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track* at medium mission impactTrack at low, Track* at medium and Attend at high mission impact.CISA BOD 26-04: 3 days if the affected system is publicly exposed; 60 days if it is not.No released fix is confirmed on this page, but CISA's timeline does not wait for a fix's release: it starts when an agency identifies the flaw on an asset and updates the CDM Agency and Federal Dashboard, and the directive counts patching, decommissioning the system or another action as remediation. Until a fixed release is applied, mitigate as this page's verdict says.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at low, Track* at medium and Attend at high mission impact.

No fix is confirmed yet. Check the vendor's advisory for a fixed release; until one is applied, restrict network exposure of the affected system or apply the vendor's mitigation on your normal schedule at low or medium mission impact and sooner than that at high.

Exploitation public PoC (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)3 days if the affected system is publicly exposed; 60 days if it is not.

No released fix is confirmed on this page, but CISA's timeline does not wait for a fix's release: it starts when an agency identifies the flaw on an asset and updates the CDM Agency and Federal Dashboard, and the directive counts patching, decommissioning the system or another action as remediation. Until a fixed release is applied, mitigate as this page's verdict says.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

May 7, 2026

Last Modified

October 26, 2026

Advisory Details (2)

Auto-updated Nov 7, 2026
🔬 Proof of concept available. No fix on record yet. Sources: github.
GitHub advisoryMentions a patch (unverified)🟡 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
Web page

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 / EcosystemFix (by version range) / 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 rangeFix by version rangeDependents
org.hyperledger.fabric-sdk-java:fabric-sdk-java1.0.0 ... 2.2.9 (58 versions)
  • 1.0.0 through 2.2.26: no fix on record
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 13× in last 7d / 58× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed its CVE.org record (CNA or CISA ADP). An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). "EchelonGraph re-scored" is our own recompute of this CVE's score, not an update from a source, and is not counted in the refreshes above. Most recent first.

Showing the most recent 100 of 412 rows on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 312 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-12 17:44 UTCEchelonGraph re-scored
  2. 2026-11-12 17:44 UTCGHSA enrichmentGHSA-prf8-cf2x-rhx7 · GitHub severity CRITICAL
  3. 2026-11-12 16:33 UTCEPSS rescoreEPSS 0.5% · 45th percentile
  4. 2026-11-11 16:39 UTCEPSS rescoreEPSS 0.5% · 45th percentile
  5. 2026-11-11 15:49 UTCEchelonGraph re-scored
  6. 2026-11-11 15:49 UTCGHSA enrichmentGHSA-prf8-cf2x-rhx7 · GitHub severity CRITICAL
  7. 2026-11-10 16:44 UTCEPSS rescoreEPSS 0.5% · 45th percentile
  8. 2026-11-10 13:55 UTCEchelonGraph re-scored
  9. 2026-11-10 13:55 UTCGHSA enrichmentGHSA-prf8-cf2x-rhx7 · GitHub severity CRITICAL
  10. 2026-11-09 16:35 UTCEPSS rescoreEPSS 0.5% · 45th percentile
  11. 2026-11-09 12:01 UTCEchelonGraph re-scored
  12. 2026-11-09 12:01 UTCGHSA enrichmentGHSA-prf8-cf2x-rhx7 · GitHub severity CRITICAL
  13. 2026-11-08 16:39 UTCEPSS rescoreEPSS 0.5% · 45th percentile
  14. 2026-11-08 10:08 UTCEchelonGraph re-scored
  15. 2026-11-08 10:08 UTCGHSA enrichmentGHSA-prf8-cf2x-rhx7 · GitHub severity CRITICAL
  16. 2026-11-07 16:39 UTCEPSS rescoreEPSS 0.5% · 45th percentile
  17. 2026-11-07 08:11 UTCEchelonGraph re-scored
  18. 2026-11-07 08:11 UTCGHSA enrichmentGHSA-prf8-cf2x-rhx7 · GitHub severity CRITICAL
  19. 2026-11-06 16:37 UTCEPSS rescoreEPSS 0.5% · 45th percentile
  20. 2026-11-06 06:16 UTCEchelonGraph re-scored
  21. 2026-11-06 06:16 UTCGHSA enrichmentGHSA-prf8-cf2x-rhx7 · GitHub severity CRITICAL
  22. 2026-11-05 16:37 UTCEPSS rescoreEPSS 0.5% · 45th percentile
  23. 2026-11-05 04:22 UTCEchelonGraph re-scored
  24. 2026-11-05 04:22 UTCGHSA enrichmentGHSA-prf8-cf2x-rhx7 · GitHub severity CRITICAL
  25. 2026-11-04 16:35 UTCEPSS rescoreEPSS 0.5% · 44th percentile
Show 75 more
  1. 2026-11-04 02:25 UTCEchelonGraph re-scored
  2. 2026-11-04 02:25 UTCGHSA enrichmentGHSA-prf8-cf2x-rhx7 · GitHub severity CRITICAL
  3. 2026-11-03 16:48 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  4. 2026-11-03 00:31 UTCEchelonGraph re-scored
  5. 2026-11-03 00:31 UTCGHSA enrichmentGHSA-prf8-cf2x-rhx7 · GitHub severity CRITICAL
  6. 2026-11-02 16:44 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  7. 2026-11-01 22:36 UTCEchelonGraph re-scored
  8. 2026-11-01 22:36 UTCGHSA enrichmentGHSA-prf8-cf2x-rhx7 · GitHub severity CRITICAL
  9. 2026-11-01 16:34 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  10. 2026-10-31 20:42 UTCEchelonGraph re-scored
  11. 2026-10-31 20:42 UTCGHSA enrichmentGHSA-prf8-cf2x-rhx7 · GitHub severity CRITICAL
  12. 2026-10-31 16:32 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  13. 2026-10-30 18:49 UTCEchelonGraph re-scored
  14. 2026-10-30 18:49 UTCGHSA enrichmentGHSA-prf8-cf2x-rhx7 · GitHub severity CRITICAL
  15. 2026-10-30 16:34 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  16. 2026-10-29 16:54 UTCEchelonGraph re-scored
  17. 2026-10-29 16:54 UTCGHSA enrichmentGHSA-prf8-cf2x-rhx7 · GitHub severity CRITICAL
  18. 2026-10-29 16:33 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  19. 2026-10-28 16:32 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  20. 2026-10-28 14:59 UTCEchelonGraph re-scored
  21. 2026-10-28 14:59 UTCGHSA enrichmentGHSA-prf8-cf2x-rhx7 · GitHub severity CRITICAL
  22. 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  23. 2026-10-27 12:53 UTCGHSA enrichmentGHSA-prf8-cf2x-rhx7 · GitHub severity CRITICAL
  24. 2026-10-26 21:28 UTCEchelonGraph re-scored
  25. 2026-10-26 21:28 UTCGHSA enrichmentGHSA-prf8-cf2x-rhx7 · GitHub severity CRITICAL
  26. 2026-10-26 16:31 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  27. 2026-10-26 01:46 UTCEchelonGraph re-scored
  28. 2026-10-26 01:46 UTCGHSA enrichmentGHSA-prf8-cf2x-rhx7 · GitHub severity CRITICAL
  29. 2026-10-25 16:32 UTCEPSS rescoreEPSS 0.5% · 44th percentile
  30. 2026-10-25 14:29 UTCEchelonGraph re-scored
  31. 2026-10-24 23:52 UTCEchelonGraph re-scored
  32. 2026-10-24 23:52 UTCGHSA enrichmentGHSA-prf8-cf2x-rhx7 · GitHub severity CRITICAL
  33. 2026-10-24 16:32 UTCEPSS rescoreEPSS 0.6% · 49th percentile
  34. 2026-10-23 21:58 UTCEchelonGraph re-scored
  35. 2026-10-23 21:57 UTCGHSA enrichmentGHSA-prf8-cf2x-rhx7 · GitHub severity CRITICAL
  36. 2026-10-23 16:31 UTCEPSS rescoreEPSS 0.6% · 49th percentile
  37. 2026-10-22 20:01 UTCEchelonGraph re-scored
  38. 2026-10-22 20:01 UTCGHSA enrichmentGHSA-prf8-cf2x-rhx7 · GitHub severity CRITICAL
  39. 2026-10-22 16:34 UTCEPSS rescoreEPSS 0.6% · 49th percentile
  40. 2026-10-21 18:05 UTCEchelonGraph re-scored
  41. 2026-10-21 18:05 UTCGHSA enrichmentGHSA-prf8-cf2x-rhx7 · GitHub severity CRITICAL
  42. 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.6% · 49th percentile
  43. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.6% · 49th percentile
  44. 2026-10-20 16:09 UTCEchelonGraph re-scored
  45. 2026-10-20 16:09 UTCGHSA enrichmentGHSA-prf8-cf2x-rhx7 · GitHub severity CRITICAL
  46. 2026-10-19 16:32 UTCEPSS rescoreEPSS 0.6% · 49th percentile
  47. 2026-10-19 14:12 UTCEchelonGraph re-scored
  48. 2026-10-19 14:11 UTCGHSA enrichmentGHSA-prf8-cf2x-rhx7 · GitHub severity CRITICAL
  49. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.6% · 49th percentile
  50. 2026-10-18 12:17 UTCGHSA enrichmentGHSA-prf8-cf2x-rhx7 · GitHub severity CRITICAL
  51. 2026-10-18 03:41 UTCEchelonGraph re-scored
  52. 2026-10-17 16:34 UTCEPSS rescoreEPSS 0.6% · 49th percentile
  53. 2026-10-17 10:22 UTCEchelonGraph re-scored
  54. 2026-10-17 10:22 UTCGHSA enrichmentGHSA-prf8-cf2x-rhx7 · GitHub severity CRITICAL
  55. 2026-10-16 16:42 UTCEPSS rescoreEPSS 0.6% · 49th percentile
  56. 2026-10-16 08:27 UTCEchelonGraph re-scored
  57. 2026-10-16 08:27 UTCGHSA enrichmentGHSA-prf8-cf2x-rhx7 · GitHub severity CRITICAL
  58. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.6% · 49th percentile
  59. 2026-10-15 06:32 UTCEchelonGraph re-scored
  60. 2026-10-15 06:32 UTCGHSA enrichmentGHSA-prf8-cf2x-rhx7 · GitHub severity CRITICAL
  61. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.6% · 49th percentile
  62. 2026-10-14 02:13 UTCEchelonGraph re-scored
  63. 2026-10-14 02:12 UTCGHSA enrichmentGHSA-prf8-cf2x-rhx7 · GitHub severity CRITICAL
  64. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  65. 2026-10-12 22:32 UTCEchelonGraph re-scored
  66. 2026-10-12 22:32 UTCGHSA enrichmentGHSA-prf8-cf2x-rhx7 · GitHub severity CRITICAL
  67. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  68. 2026-10-12 16:08 UTCEchelonGraph re-scored
  69. 2026-10-12 08:01 UTCGHSA enrichmentGHSA-prf8-cf2x-rhx7 · GitHub severity CRITICAL
  70. 2026-10-11 19:50 UTCEchelonGraph re-scored
  71. 2026-10-11 17:04 UTCEchelonGraph re-scored
  72. 2026-10-11 14:30 UTCEchelonGraph re-scored
  73. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  74. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.6% · 48th percentile
  75. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.6% · 48th percentile

Frequently asked(5)

What is CVE-2026-41586?
CVE-2026-41586 is a critical-severity vulnerability; its CVE record was 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 the CVE record for CVE-2026-41586 published?
The CVE record for CVE-2026-41586 was published on May 7, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of October 26, 2026; the record at its source may have been updated since.
Is CVE-2026-41586 actively exploited?
CVE-2026-41586 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (45th percentile of EPSS-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?
No fix for CVE-2026-41586 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The vendor advisories EchelonGraph has for CVE-2026-41586 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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