CVE-2026-41586: CWE-502: Deserialization of Untrusted Data in hyperledger fabric
CVE-2026-41586 is a critical vulnerability in Hyperledger Fabric versions 1.0.0 through 2.2.26 involving unsafe deserialization of untrusted data. The vulnerability arises because Channel.java calls ObjectInputStream.readObject() on untrusted byte arrays without an ObjectInputFilter, leading to a classic Java deserialization remote code execution (RCE) pattern. No patches or official fixes are available at the time of publication. The vulnerability has a high CVSS 4.
AI Analysis
Technical Summary
Hyperledger Fabric versions 1.0.0 to 2.2.26 contain a deserialization vulnerability (CWE-502) in Channel.java where the readObject() and deSerializeChannel() methods invoke ObjectInputStream.readObject() on untrusted byte arrays without applying an ObjectInputFilter. This unsafe deserialization can lead to remote code execution. The vulnerability is publicly disclosed with no available patch or remediation at the time of publication. It is not a cloud service, so remediation depends on the user applying vendor fixes once available.
Potential Impact
Successful exploitation of this vulnerability could allow an unauthenticated attacker to execute arbitrary code remotely on affected Hyperledger Fabric nodes by sending crafted serialized data. This could lead to full compromise of the affected system. The CVSS 4.0 score of 9.3 reflects the critical impact with network attack vector, no privileges or user interaction required, and high impact on confidentiality, integrity, and availability.
Mitigation Recommendations
At the time of publication, no official patch or fix is available for this vulnerability. Users should monitor the Hyperledger Fabric vendor advisories for updates and apply patches promptly once released. Until a fix is available, consider restricting access to affected components and avoid processing untrusted serialized data if possible.
CVE-2026-41586: CWE-502: Deserialization of Untrusted Data in hyperledger fabric
Description
CVE-2026-41586 is a critical vulnerability in Hyperledger Fabric versions 1.0.0 through 2.2.26 involving unsafe deserialization of untrusted data. The vulnerability arises because Channel.java calls ObjectInputStream.readObject() on untrusted byte arrays without an ObjectInputFilter, leading to a classic Java deserialization remote code execution (RCE) pattern. No patches or official fixes are available at the time of publication. The vulnerability has a high CVSS 4.
CVSS v4.0
Score 9.3critical
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Hyperledger Fabric versions 1.0.0 to 2.2.26 contain a deserialization vulnerability (CWE-502) in Channel.java where the readObject() and deSerializeChannel() methods invoke ObjectInputStream.readObject() on untrusted byte arrays without applying an ObjectInputFilter. This unsafe deserialization can lead to remote code execution. The vulnerability is publicly disclosed with no available patch or remediation at the time of publication. It is not a cloud service, so remediation depends on the user applying vendor fixes once available.
Potential Impact
Successful exploitation of this vulnerability could allow an unauthenticated attacker to execute arbitrary code remotely on affected Hyperledger Fabric nodes by sending crafted serialized data. This could lead to full compromise of the affected system. The CVSS 4.0 score of 9.3 reflects the critical impact with network attack vector, no privileges or user interaction required, and high impact on confidentiality, integrity, and availability.
Mitigation Recommendations
At the time of publication, no official patch or fix is available for this vulnerability. Users should monitor the Hyperledger Fabric vendor advisories for updates and apply patches promptly once released. Until a fix is available, consider restricting access to affected components and avoid processing untrusted serialized data if possible.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-04-21T14:15:21.959Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69fc24d8cbff5d86109abcb9
Added to database: 05/07/2026, 05:36:24 UTC
Last enriched: 05/14/2026, 10:48:26 UTC
Last updated: 07/31/2026, 19:22:58 UTC
Views: 264
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