Spark is an off-chain scaling solution that builds on top of Statechains to enable instant, extremely low fee, and unlimited self-custodial transactions of Bitcoin and tokens while also natively enabling sending and receiving via Lightning.
Maximum Bounty
$100,000Live Since
06 May 2026Last Updated
06 May 2026Triaged by Immunefi
PoC Required
KYC required
Select the category you'd like to explore
Assets in Scope
Impacts in Scope
Severity
Critical
Title
Direct loss of funds
Severity
Critical
Title
Permanent freezing of funds (fix requires hardfork)
Severity
High
Title
RPC API crash affecting programs with greater than or equal to 25% of the market capitalization on top of the respective layer (excluding DoS-related attack vector)
Out of scope
Program's Out of Scope information
Blockchain/DLT Specific:
- 0-confirmation (0-conf) transactions with Replace-By-Fee (RBF) enabled are excluded from this program. Vulnerabilities or attack vectors that rely solely on the ability to replace unconfirmed transactions are not eligible for bounty consideration.
- Any vulnerabilities related to malicious Spark Operators (SOs)
Default Out of Scope and rules
Blockchain/DLT specific
- Incorrect data supplied by third party oracles
- Not to exclude oracle manipulation/flash loan attacks
- Impacts requiring basic economic and governance attacks (e.g. 51% attack)
- Lack of liquidity impacts
- Impacts from Sybil attacks
- Impacts involving centralization risks
All categories
- Impacts requiring attacks that the reporter has already exploited themselves, leading to damage
- Impacts caused by attacks requiring access to leaked keys/credentials
- Impacts caused by attacks requiring access to privileged addresses (including, but not limited to: governance and strategist contracts) without additional modifications to the privileges attributed
- Impacts relying on attacks involving the depegging of an external stablecoin where the attacker does not directly cause the depegging due to a bug in code
- Mentions of secrets, access tokens, API keys, private keys, etc. in Github will be considered out of scope without proof that they are in-use in production
- Best practice recommendations
- Feature requests
- Impacts on test files and configuration files unless stated otherwise in the bug bounty program
- Impacts requiring phishing or other social engineering attacks against project's employees and/or customers