What’s Vulnerable › Vulnerabilities

CVE-2026-40069: bsv-sdk ARC broadcaster treats INVALID/MALFORMED/ORPHAN responses as successful broadcasts

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-04-09 · updated 2026-10-26
• Weakness: CWE-754

Description

BSV Ruby SDK is the Ruby SDK for the BSV blockchain. From 0.1.0 to before 0.8.2, BSV::Network::ARC's failure detection only recognises REJECTED and DOUBLE_SPEND_ATTEMPTED. ARC responses with txStatus values of INVALID, MALFORMED, MINED_IN_STALE_BLOCK, or any ORPHAN-containing extraInfo / txStatus are silently treated as successful broadcasts. Applications that gate actions on broadcaster success are tricked into trusting transactions that were never accepted by the network. This vulnerability is fixed in 0.8.2.

Affected products

• sgbett bsv-ruby-sdk: from 0.1.0 before 0.8.2 — fixed in 0.8.2

How to fix

Upgrade to a fixed version: sgbett bsv-ruby-sdk 0.8.2. Check the vendor advisory for mitigations.

References

• https://github.com/sgbett/bsv-ruby-sdk/commit/4992e8a265fd914a7eeb0405c69d1ff0122a84cc
• https://github.com/sgbett/bsv-ruby-sdk/issues/305
• https://github.com/sgbett/bsv-ruby-sdk/pull/306
• https://github.com/sgbett/bsv-ruby-sdk/releases/tag/v0.8.2
• https://github.com/sgbett/bsv-ruby-sdk/security/advisories/GHSA-9hfr-gw99-8rhx

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