{"cve":"CVE-2021-43667","nvd":{"published":"2021-11-18T16:15:09.073","modified":"2026-06-17T04:11:14.877","status":"Modified","description":"A vulnerability has been detected in HyperLedger Fabric v1.4.0, v2.0.0, v2.1.0. This bug can be leveraged by constructing a message whose payload is nil and sending this message with the method 'forwardToLeader'. This bug has been admitted and fixed by the developers of Fabric. If leveraged, any leader node will crash.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5},"cwes":["CWE-476"],"references":["https://github.com/hyperledger/fabric/pull/2844","https://jira.hyperledger.org/browse/FAB-18529","https://github.com/hyperledger/fabric/pull/2844","https://jira.hyperledger.org/browse/FAB-18529"],"products":["linuxfoundation:fabric"],"source":"nvd","synced_at":"2026-10-19T21:25:41.256909649+00:00"},"epss":{"cve":"CVE-2021-43667","score":0.01336,"percentile":0.71219,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-vjj6-5m9f-wqjw","url":"https://osv.dev/vulnerability/GHSA-vjj6-5m9f-wqjw","summary":"NULL Pointer Dereference in HyperLedger Fabric","modified":"2023-11-08T04:07:11.200758Z","packages":[{"ecosystem":"Go","name":"github.com/hyperledger/fabric","purl":"pkg:golang/github.com/hyperledger/fabric","ranges":[">=2.3.0 <2.3.3"],"fixed":["2.3.3"]},{"ecosystem":"Go","name":"github.com/hyperledger/fabric","purl":"pkg:golang/github.com/hyperledger/fabric","ranges":["<2.2.4"],"fixed":["2.2.4"]}]}],"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."]}