{"cve":"CVE-2023-46132","nvd":{"published":"2023-11-14T21:15:11.003","modified":"2026-06-17T06:30:13.147","status":"Modified","description":"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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N","score":6.5},"cwes":["CWE-362"],"references":["https://github.com/hyperledger/fabric/security/advisories/GHSA-v9w2-543f-h69m","https://github.com/hyperledger/fabric/security/advisories/GHSA-v9w2-543f-h69m"],"products":["hyperledger:fabric"],"source":"nvd","synced_at":"2026-10-19T21:42:07.670898610+00:00"},"epss":{"cve":"CVE-2023-46132","score":0.00519,"percentile":0.44154,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-v9w2-543f-h69m","url":"https://osv.dev/vulnerability/GHSA-v9w2-543f-h69m","summary":"Fabric vulnerable to crosslinking transaction attack","modified":"2026-09-10T03:49:59.228192150Z","packages":[{"ecosystem":"Go","name":"github.com/hyperledger/fabric","purl":"pkg:golang/github.com/hyperledger/fabric","ranges":[">=1.0.0-alpha <2.2.14"],"fixed":["2.2.14"]},{"ecosystem":"Go","name":"github.com/hyperledger/fabric","purl":"pkg:golang/github.com/hyperledger/fabric","ranges":[">=2.3.0 <2.5.5"],"fixed":["2.5.5"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}