Vulnerabilities > Hyperledger > Iroha > Medium
| DATE | CVE | VULNERABILITY TITLE | RISK |
|---|---|---|---|
| 2018-06-01 | CVE-2018-3756 | Improper Verification of Cryptographic Signature vulnerability in Hyperledger Iroha 1.0/1.0.0 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. | 5.0 |