CVE-2026-40069 bsv-sdk ARC broadcaster treats INVALID/MALFORMED/ORPHAN responses as successful broadcasts
The BSV Ruby SDK incorrectly treats invalid blockchain transactions as successful, potentially leading to data integrity issues in applications relying on broadcast confirmation.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-40069?
CVE-2026-40069 is a high-severity vulnerability in sgbett bsv-ruby-sdk, published on 9 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
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.
Weakness: CWE-754
Which versions are affected by CVE-2026-40069?
2 open source packages ship an affected version, including bsv-sdk. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
bsv-sdk RubyGems | From 0.1.0 | 0.8.2 |
bsv-sdk RubyGems | From 0.1.0 | 0.8.2 |
Products include Sgbett Bsv Ruby Sdk.
How do I fix CVE-2026-40069?
Upgrade bsv-sdk to 0.8.2 or later.
Is CVE-2026-40069 being exploited?
There is no known exploitation of CVE-2026-40069 in the wild and no public exploit code.
Sources
Also known as GHSA-9hfr-gw99-8rhx.