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CVE-2026-40070

8.1 · HIGH

BSV Ruby SDK is the Ruby SDK for the BSV blockchain.

Published Apr 9, 2026CWE-347EPSS 0.20%

Overview

CVE-2026-40070 is a high-severity vulnerability. It was published on April 9, 2026 and has a CVSS 3.1 base score of 8.1 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.1, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical description

BSV Ruby SDK is the Ruby SDK for the BSV blockchain. From 0.3.1 to before 0.8.2, BSV::Wallet::WalletClient#acquire_certificate persists certificate records to storage without verifying the certifier's signature over the certificate contents. In acquisition_protocol: 'direct', the caller supplies all certificate fields (including signature:) and the record is written to storage verbatim. In acquisition_protocol: 'issuance', the client POSTs to a certifier URL and writes whatever signature the response body contains, also without verification. An attacker who can reach either API (or who controls a certifier endpoint targeted by the issuance path) can forge identity certificates that subsequently appear authentic to list_certificates and prove_certificate.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refbrc.dev/52GitHubgithub.com/sgbett/bsv-ruby-sdk/commit/4992e8a265fd914a7eeb0405c69d1ff0122a84ccGitHubgithub.com/sgbett/bsv-ruby-sdk/issues/305GitHubgithub.com/sgbett/bsv-ruby-sdk/pull/306GitHubgithub.com/sgbett/bsv-ruby-sdk/security/advisories/GHSA-hc36-c89j-5f4jGitHubgithub.com/sgbett/bsv-ruby-sdk/security/advisories/GHSA-hc36-c89j-5f4j

How CyberStrike helps

Frequently asked questions

What is CVE-2026-40070?

CVE-2026-40070 is a high-severity vulnerability. It was published on April 9, 2026 and has a CVSS 3.1 base score of 8.1 (HIGH).

How severe is CVE-2026-40070?

This vulnerability has a CVSS 3.1 base score of 8.1, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-40070?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-40070?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-40070 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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