CVE-2026-40069

bsv-sdk ARC broadcaster treats INVALID/MALFORMED/ORPHAN responses as successful broadcasts

CVSS 7.5 HIGHEPSS 0.3%CWE-754

Vexday Risk Score

21Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 7.5EPSS 0.3%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

09 Apr 2026Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Affected products

sgbett · bsv-ruby-sdk

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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