GHSA-v9w2-543f-h69m · Severity: high · Ecosystem: go — Fabric vulnerable to crosslinking transaction attack
Hyperledger Fabric is an open source permissioned distributed ledger framework. Combining two molecules to one another, called "cross-linking" results in a molecule with a chemical formula that is composed of all atoms of the original two molecules. In Fabric, one can take a block of transactions and cross-link the transactions in a way that alters the way the peers parse the transactions. If a first peer receives a block B and a second peer receives a block identical to B but with the transactions being cross-linked, the second peer will parse transactions in a different way and thus its world state will deviate from the first peer. Orderers or peers cannot detect that a block has its transactions cross-linked, because there is a vulnerability in the way Fabric hashes the transactions of blocks. It simply and naively concatenates them, which is insecure and lets an adversary craft a "cross-linked block" (block with cross-linked transactions) which alters the way peers process transactions. For example, it is possible to select a transaction and manipulate a peer to completely avoid processing it, without changing the computed hash of the block. Additional validations have been added in v2.2.14 and v2.5.5 to detect potential cross-linking issues before processing blocks. Users are advised to upgrade. There are no known workarounds for this vulnerability.
Conclusion & alert: CVE-2023-46132 is rated Exploit Available (57.7/100): CVSS High severity, with low exploitation likelihood (EPSS 0.52%). Core evidence: 1 public exploit reference(s) are indexed (Exploit-DB). Mandatory action: Public exploits are available—assess exposure, apply mitigations, and prioritize patching.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
| EDB-ID | Source | Kind | Published | Link |
|---|---|---|---|---|
| — | nvd_ref | exploit_tag | Exploit-DB ↗ |
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2026-06-15 | 0.18% | 0.52% | +0.34% |
| 2 | 2026-03-04 | 0.09% | 0.18% | +0.09% |
| 3 | 2026-03-01 | — | 0.09% | — |
Full EPSS history (28 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 7.1 | 3.1 | HIGH |
|
2.8 | 4.2 | [email protected] |
| 6.5 | 3.1 | MEDIUM |
|
2.8 | 3.6 | [email protected] |
GHSA-v9w2-543f-h69m · Severity: high · Ecosystem: go — Fabric vulnerable to crosslinking transaction attack
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| hyperledger | fabric | >= 1.0.0, < 2.2.14 | cpe:2.3:a:hyperledger:fabric:*:*:*:*:*:*:*:* |
| hyperledger | fabric | >= 2.3.0, < 2.5.5 | cpe:2.3:a:hyperledger:fabric:*:*:*:*:*:*:*:* |
| URL | Tags |
|---|---|
| https://github.com/hyperledger/fabric/security/advisories/GHSA-v9w2-543f-h69m | Exploit Mitigation Vendor Advisory |