{"id":"CVE-2018-3756","aliases":["EUVD-2018-0149","GHSA-jmw4-vrcr-pppg","PYSEC-2018-150"],"status":"published","title":"Hyperledger Iroha versions v1.0_beta and v1.0.0_beta-1 are vulnerable to transaction and block...","description":"Hyperledger Iroha versions v1.0_beta and v1.0.0_beta-1 are vulnerable to transaction and block signature verification bypass in the transaction and block validator allowing a single node to sign a transaction and/or block multiple times, each with a random nonce, and have other validating nodes accept them as separate valid signatures.","severity":{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.00803,"percentile":0.56978,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-347"],"published":"2018-06-01T19:00:00Z","modified":"2026-06-17T01:57:46Z","products":[{"vendor":"hyperledger","product":"iroha"}],"references":[{"url":"https://github.com/hyperledger/iroha/releases/tag/v1.0.0_beta-2","tags":["x_refsource_CONFIRM","x_transferred","Third Party Advisory","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2018-3756"},{"url":"https://github.com/advisories/GHSA-jmw4-vrcr-pppg"}],"sources":{"cve":[{"id":"CVE-2018-3756","description":"Hyperledger Iroha versions v1.0_beta and v1.0.0_beta-1 are vulnerable to transaction and block signature verification bypass in the transaction and block validator allowing a single node to sign a transaction and/or block multiple times, each with a random nonce, and have other validating nodes accept them as separate valid signatures.","status":"published","published":"2018-06-01T19:00:00Z","modified":"2024-09-17T03:34:16.191Z","updated_at":"2026-11-02T14:35:05.619113Z"}],"euvd":[{"id":"EUVD-2018-0149","description":"Hyperledger Iroha versions v1.0_beta and v1.0.0_beta-1 are vulnerable to transaction and block signature verification bypass in the transaction and block validator allowing a single node to sign a transaction and/or block multiple times, each with a random nonce, and have other validating nodes accept them as separate valid signatures.","status":"published","published":"2018-06-01T19:00:00Z","modified":"2024-09-17T03:34:16Z","updated_at":"2026-11-03T00:28:30.275492Z"}],"ghsa":[{"id":"GHSA-jmw4-vrcr-pppg","title":"Hyperledger Iroha versions v1.0_beta and v1.0.0_beta-1 are vulnerable to transaction and block...","description":"Hyperledger Iroha versions v1.0_beta and v1.0.0_beta-1 are vulnerable to transaction and block signature verification bypass in the transaction and block validator allowing a single node to sign a transaction and/or block multiple times, each with a random nonce, and have other validating nodes accept them as separate valid signatures.","status":"published","published":"2022-05-14T03:13:26Z","modified":"2023-02-02T05:07:49Z","cvss":[{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high"}],"cwes":["CWE-347"],"updated_at":"2026-11-02T14:52:35.379197Z"}],"nvd":[{"id":"CVE-2018-3756","description":"Hyperledger Iroha versions v1.0_beta and v1.0.0_beta-1 are vulnerable to transaction and block signature verification bypass in the transaction and block validator allowing a single node to sign a transaction and/or block multiple times, each with a random nonce, and have other validating nodes accept them as separate valid signatures.","status":"published","published":"2018-06-01T19:29:00.363Z","modified":"2026-06-17T01:57:46.687Z","cvss":[{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high","assessor":"primary"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:P/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-347"],"updated_at":"2026-11-02T14:04:28.483469Z"}],"osv":[{"id":"PYSEC-2018-150","description":"Hyperledger Iroha versions v1.0_beta and v1.0.0_beta-1 are vulnerable to transaction and block signature verification bypass in the transaction and block validator allowing a single node to sign a transaction and/or block multiple times, each with a random nonce, and have other validating nodes accept them as separate valid signatures.","status":"withdrawn","published":"2018-06-01T19:29:00Z","modified":"2024-11-21T14:22:52.162008Z","cvss":[{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high"}],"updated_at":"2026-11-02T15:52:51.645172Z"}]}}