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50 $ 


SmartContract looks forward to working with the security community to find vulnerabilities in order to keep our businesses and customers safe.

Bounty Multiplier during May

We're pleased to announce another 2x bounty multiplier for all valid reports submitted in the month of May. This is a public program, so we encourage you to tell your friends about this promotion!

Please be mindful of our policy when conducting your testing. We are especially interested in reports on our Solidity contracts and our Golang client, but any valid submission that could compromise our security will be eligible for the promotion.

Response Targets

SmartContract will make a best effort to meet the following SLAs for hackers participating in our program:

Type of Response | SLA in business days
First Response | 3 day
Time to Triage | 5 days
Time to Bounty | 30 days
Time to Resolution | depends on severity and complexity

We’ll try to keep you informed about our progress throughout the process.

Information & Resources

The Chainlink node is a part of a decentralized oracle network used to feed data to smart contracts. Job Specifications are added to the node through a REST API so that it knows what tasks to perform. The Chainlink node utilizes a websocket connection (for pubsub) to an Ethereum client (Geth or Parity) in order to watch for new blocks containing specific event logs. Once the external data is retrieved, the Chainlink node will sign the transaction, and broadcast it through the Ethereum client (the wallet is stored on the Chainlink node, not the Ethereum client). An overview of the architecture is available here .


Core Node:

The Chainlink node and its smart contracts are the core focus of this program. Issues related to a loss of funds for the node operator or requester will take the highest bounty reward. There are a few areas of this code base which are out-of-scope, see the Scope section at the bottom of this page for details.

We also have a project tracker where existing bugs are kept. Be sure to check there for issues that we already know about.

Solidity Smart Contracts:


The smart contracts residing on the Github repository are in scope and will be awarded with bonuses if a vulnerability is found through creating Chainlink requests.

LINK Testnet Faucets:,, &

The faucets provide users with the ability to receive test LINK on test networks. Since they are test networks, we are more concerned with vulnerabilities which would cause a loss of service.

Explorers:,,, (

Chainlink Explorer allows requesters to view information about their request without requiring access to the Chainlink node themselves.

Feeds UI: (

The application and source code driving the Decentralized Price Reference Data page.

Installation & Setup

We have guides available for how to get a Chainlink node running locally. See the links below for step-by-step walk-throughs. Feel free to reach out on our Discord for help.

Testnet Chainlink Nodes

Use our Decentralized Oracles on Testnet documentation page for existing Chainlink nodes running on the Ethereum test networks. Vulnerabilities found with the official Chainlink nodes (noted by being ran by Chainlink) on this page are considered in scope.

Disclosure Policy

  • As this is a private program, please do not discuss this program or any vulnerabilities (even resolved ones) outside of the program without express consent from the organization.
  • Follow HackerOne's disclosure guidelines .

Program Rules

  • Please provide detailed reports with reproducible steps. If the report is not detailed enough to reproduce the issue, the issue will not be eligible for a reward.
  • Submit one vulnerability per report, unless you need to chain vulnerabilities to provide impact.
  • When duplicates occur, we only award the first report that was received (provided that it can be fully reproduced).
  • Multiple vulnerabilities caused by one underlying issue will be awarded one bounty.
  • Social engineering (e.g. phishing, vishing, smishing) is prohibited.
  • Make a good faith effort to avoid privacy violations, destruction of data, and interruption or degradation of our service. Only interact with accounts you own or with explicit permission of the account holder.

Out of scope vulnerabilities

When reporting vulnerabilities, please consider (1) attack scenario / exploitability, and (2) security impact of the bug. The following issues are considered out of scope:

  • and
  • any subdomain of *
  • Intercom add-on on any asset (the in-browser chat application)
  • SGX-related issues or vulnerabilities
  • Issues/bugs/vulnerabilities specific to the given Ethereum client (Geth or Parity)
  • OS-related vulnerabilities
  • Clickjacking on pages with no sensitive actions.
  • Unauthenticated/logout/login CSRF.
  • Attacks requiring MITM or physical access to a user's device.
  • Previously known vulnerable libraries without a working Proof of Concept.
  • Comma Separated Values (CSV) injection without demonstrating a vulnerability.
  • Missing best practices in SSL/TLS configuration.
  • Email or DNS configurations
  • Site or domain configuration
  • Any activity that could lead to the disruption of our service (DoS; please set up POCs on a private chain).
  • Content spoofing and text injection issues without showing an attack vector/without being able to modify HTML/CSS

Safe Harbor

Any activities conducted in a manner consistent with this policy will be considered authorized conduct and we will not initiate legal action against you. If legal action is initiated by a third party against you in connection with activities conducted under this policy, we will take steps to make it known that your actions were conducted in compliance with this policy.

Thank you for helping keep Chainlink and our users safe!

In Scope

Scope Type Scope Name






Chainlink repo

Out of Scope

Scope Type Scope Name









The public program Chainlink on the platform Hackerone has been updated on 2020-03-03, The lowest reward is 50 $.

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