{"id":"CVE-2021-43669","aliases":["EUVD-2021-2543","GHSA-j96p-r523-8r3w"],"status":"published","title":"HTTP Request Smuggling in github.com/hyperledger/fabric","description":"A vulnerability has been detected in HyperLedger Fabric v1.4.0, v2.0.0, v2.0.1, v2.3.0. It can easily break down as many orderers as the attacker wants. This bug can be leveraged by constructing a message whose header is invalid to the interface Order. This bug has been admitted and fixed by the developers of Fabric.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-12","score":0.01127,"percentile":0.668,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-444"],"published":"2021-11-18T15:05:27Z","modified":"2026-10-20T10:54:12Z","fixes":[{"ecosystem":"Go","package":"github.com/hyperledger/fabric","fixed_in":["2.4.0"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"Go","package":"github.com/hyperledger/fabric","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.4.0"}]}]},{"source":"osv","ecosystem":"Go","package":"github.com/hyperledger/fabric","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"2.4.0"}]}]}],"products":[{"vendor":"linuxfoundation","product":"fabric"}],"references":[{"url":"https://jira.hyperledger.org/browse/FAB-18528","tags":["x_refsource_MISC","x_transferred","Vendor Advisory","advisory","web"]},{"url":"https://github.com/hyperledger/fabric/pull/2828","tags":["x_refsource_MISC","x_transferred","Patch","Third Party Advisory","fix","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-43669","tags":["advisory"]},{"url":"https://github.com/hyperledger/fabric/releases/tag/v2.4.0-beta","tags":["web"]},{"url":"https://github.com/advisories/GHSA-j96p-r523-8r3w"},{"url":"https://github.com/hyperledger/fabric","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2021-43669","description":"A vulnerability has been detected in HyperLedger Fabric v1.4.0, v2.0.0, v2.0.1, v2.3.0. It can easily break down as many orderers as the attacker wants. This bug can be leveraged by constructing a message whose header is invalid to the interface Order. This bug has been admitted and fixed by the developers of Fabric.","status":"published","published":"2021-11-18T15:05:27Z","modified":"2024-08-04T04:03:08.435Z","updated_at":"2026-11-02T14:32:56.689433Z"}],"euvd":[{"id":"EUVD-2021-2543","description":"A vulnerability has been detected in HyperLedger Fabric v1.4.0, v2.0.0, v2.0.1, v2.3.0. It can easily break down as many orderers as the attacker wants. This bug can be leveraged by constructing a message whose header is invalid to the interface Order. This bug has been admitted and fixed by the developers of Fabric.","status":"published","published":"2021-11-18T15:05:27Z","modified":"2024-08-04T04:03:08Z","updated_at":"2026-11-03T03:24:13.772922Z"}],"ghsa":[{"id":"GHSA-j96p-r523-8r3w","title":"HTTP Request Smuggling in github.com/hyperledger/fabric","description":"A vulnerability has been detected in HyperLedger Fabric v1.4.0, v2.0.0, v2.0.1, v2.3.0. It can easily break down as many orderers as the attacker wants. This bug can be leveraged by constructing a message whose header is invalid to the interface Order. This bug has been admitted and fixed by the developers of Fabric.","status":"published","published":"2021-12-03T20:52:02Z","modified":"2023-02-01T05:06:18Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-444"],"updated_at":"2026-11-02T14:36:38.281533Z"}],"nvd":[{"id":"CVE-2021-43669","description":"A vulnerability has been detected in HyperLedger Fabric v1.4.0, v2.0.0, v2.0.1, v2.3.0. It can easily break down as many orderers as the attacker wants. This bug can be leveraged by constructing a message whose header is invalid to the interface Order. This bug has been admitted and fixed by the developers of Fabric.","status":"published","published":"2021-11-18T16:15:09.323Z","modified":"2026-06-17T04:11:15.12Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-444"],"updated_at":"2026-11-02T14:07:01.428028Z"}],"osv":[{"id":"CVE-2021-43669","description":"A vulnerability has been detected in HyperLedger Fabric v1.4.0, v2.0.0, v2.0.1, v2.3.0. It can easily break down as many orderers as the attacker wants. This bug can be leveraged by constructing a message whose header is invalid to the interface Order. This bug has been admitted and fixed by the developers of Fabric.","status":"published","published":"2021-11-18T16:15:09.323Z","modified":"2026-10-20T10:54:12.138348552Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:44:21.877444Z"},{"id":"GHSA-j96p-r523-8r3w","title":"HTTP Request Smuggling in github.com/hyperledger/fabric","description":"A vulnerability has been detected in HyperLedger Fabric v1.4.0, v2.0.0, v2.0.1, v2.3.0. It can easily break down as many orderers as the attacker wants. This bug can be leveraged by constructing a message whose header is invalid to the interface Order. This bug has been admitted and fixed by the developers of Fabric.","status":"published","published":"2021-12-03T20:52:02Z","modified":"2023-11-08T04:07:11.323394Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-444"],"updated_at":"2026-11-02T15:46:50.336262Z"}]}}