Deserialization of Untrusted Data in Fabric - CVE-2026-41586
Published: April 23, 2026
Vulnerability identifier: #VU127237
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-41586
CWE-ID: CWE-502
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: hyperledger
Affected software:
Fabric
Fabric
Detailed vulnerability description
The vulnerability allows a local user to execute arbitrary code.
The vulnerability exists due to deserialization of untrusted data in Channel.deSerializeChannel() and Channel.readObject() when processing untrusted serialized Channel byte arrays. A local user can supply crafted serialized data to execute arbitrary code.
This is a client-side deserialization surface and user interaction may be required to open or process attacker-controlled serialized channel data.
How to mitigate CVE-2026-41586
Install security update from vendor's website.