CVE-2026-41586 json
ObjectInputStream.readObject() without ObjectInputFilter in fabric-sdk-java allows Java deserialization RCE
published 6mo ago modified 14d ago also BIT-hyperledger-fabric-orderer-2026-41586 , BIT-hyperledger-fabric-peer-2026-41586 , BIT-hyperledger-fabric-tools-2026-41586 , EUVD-2026-28316 , GHSA-prf8-cf2x-rhx7
- cvss
- 9.8
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.5%
- EPSS 0.5% chance of exploitation in 30 days, percentile 45%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- bitnami hyperledger-fabric-orderer 2.5.9
- bitnami hyperledger-fabric-peer 2.5.9
- bitnami hyperledger-fabric-tools 2.5.9
Is CVE-2026-41586 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerCISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- yes
- Technical impact
- total
- Assessed
- 6mo ago
Exploit prediction
0.53% chance of exploitation in the next 30 days, higher than 45% of all scored CVEs (FIRST EPSS, 2026-11-09).
Exploits and checks
- github.com https://github.com/hyperledger/fabric/security/advisories/GHSA-prf8-cf2x-rhx7 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 9.3 | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N |
| CNA | 4.0 | 9.3 | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
| NVD | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| maven | org.hyperledger.fabric-sdk-java:fabric-sdk-java | >=1.0.0, <=2.2.26 |
no fix listed |
| bitnami | hyperledger-fabric-orderer | >=1.0.0, <2.5.9 |
2.5.9 |
| bitnami | hyperledger-fabric-peer | >=1.0.0, <2.5.9 |
2.5.9 |
| bitnami | hyperledger-fabric-tools | >=1.0.0, <2.5.9 |
2.5.9 |
Affected products
- hyperledger fabric
Classification
- Weakness
-
- CWE-502 Deserialization of Untrusted Data
References
-
github.com
/hyperledger/fabric/security/advisories/GHSA-prf8-cf2x-rhx7
exploit, web, mitigation, vendor-advisory, advisory
-
hyperledger.github.io
/fabric-gateway
web, product
-
nvd.nist.gov
/vuln/detail/CVE-2026-41586
advisory, web
-
github.com
/hyperledger/fabric-sdk-java
package
Sources
- CVE List CVE-2026-41586
- GitHub Advisory GHSA-prf8-cf2x-rhx7
- NVD CVE-2026-41586
- OSV BIT-hyperledger-fabric-orderer-2026-41586
- OSV BIT-hyperledger-fabric-peer-2026-41586
- OSV BIT-hyperledger-fabric-tools-2026-41586
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.