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Sei

Sei is the fastest Layer 1 blockchain, designed to scale with the industry. Pushing the boundaries of blockchain technology through open source development, Sei stands to unlock a brand new design space for consumer facing applications.

Sei
Blockchain
Bridge
L1
Staking
Go
Rust
Maximum Bounty
$500,000
Live Since
30 November 2023
Last Updated
28 August 2025
  • Triaged by Immunefi

  • PoC Required

  • KYC required

  • Arbitration enabled

Select the category you'd like to explore

Assets in Scope

Target
Type
Blockchain/DLT
Added on
31 May 2024
Target
Type
Blockchain/DLT - Sei Cosmos
Added on
30 November 2023
Target
Type
Blockchain/DLT - Sei Tendermind
Added on
30 November 2023
Target
Primacy Of Impact
Type
Blockchain/DLT
Added on
30 November 2023
Target
Type
Blockchain/DLT - Sei Chain
Added on
30 November 2023

Impacts in Scope

Severity
Critical
Title

Direct loss of funds

Severity
Critical
Title

Permanent freezing of funds (fix requires hard fork)

Severity
High
Title

RPC API crash affecting projects with greater than or equal to 25% of the market capitalization on top of the respective layer

Severity
High
Title

Unintended permanent chain split requiring hard fork (network partition requiring hard fork)

Severity
High
Title

Network not being able to confirm new transactions (total network shutdown)

Severity
Medium
Title

Increasing network processing node resource consumption by at least 30% without brute force actions, compared to the preceding 24 hours

Severity
Medium
Title

Shutdown of greater than or equal to 30% of network processing nodes without brute force actions, but does not shut down the network

Severity
Medium
Title

A bug in the respective layer 0/1/2 network code that results in unintended smart contract behavior with no concrete funds at direct risk

Severity
Medium
Title

Temporary freezing of network transactions by delaying one block by 500% or more of the average block time of the preceding 24 hours beyond standard difficulty adjustments

Severity
Medium
Title

Causing network processing nodes to process transactions from the mempool beyond set parameters

Severity
Low
Title

Shutdown of greater than 10% or equal to but less than 30% of network processing nodes without brute force actions, but does not shut down the network

Severity
Low
Title

Modification of transaction fees outside of design parameters

Out of scope

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