Vulnerability · Published Apr 9, 2026 · Assigned by GitHub_M

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

High 7.5

In plain English

A high-severity security flaw in bsv-ruby-sdk from sgbett. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 20% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.5High

Exploit odds (30 days)0.3%top 79.9% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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 packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
RubyGems	bsv-sdk	0.8.2	GHSA-9hfr-gw99-8rhx

Affected products (as reported)

Vendor	Product	Versions
sgbett	bsv-ruby-sdk	>= 0.1.0, < 0.8.2

Weakness: CWE-754 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

References

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