Cosmos Bug Bounty Program

Program Overview

Cosmos runs a bug bounty program on HackerOne. The program has 12 in-scope assets.

In-Scope Assets

Asset	Type	Max Severity	Eligible
CometBFT	OTHER	Critical	Bounty
CosmWasm	OTHER	Critical	Bounty
Cosmos SDK	OTHER	Critical	Bounty
Hermes Relayer	OTHER	Critical	Bounty
Horcrux	OTHER	Low	Bounty
Solidity IBC Eureka	OTHER	Critical	Bounty
https://github.com/cosmos/gaia	SOURCE_CODE	Critical	Bounty
https://github.com/cosmos/iavl	SOURCE_CODE	Critical	Bounty
https://github.com/cosmos/ics23	SOURCE_CODE	Critical	Bounty
https://github.com/cosmos/ledger-cosmos	SOURCE_CODE	Low	Bounty
ibc-go	OTHER	Critical	Bounty
www.github.com/cosmos/evm	SOURCE_CODE	Critical	Bounty

Tips for Hacking Cosmos

1. Read the policy — Understand what's in scope, out of scope, and any specific testing restrictions before you start.
2. Enumerate the attack surface — Use subdomain enumeration and directory bruteforcing to map all accessible endpoints.
3. Focus on high-impact bugs — Look for SQL injection, SSRF, and IDOR vulnerabilities first.
4. Test authentication flows — Check for OAuth misconfigurations and CSRF in login/signup flows.
5. Write clear reports — Include steps to reproduce, impact assessment, and suggested remediation. Use Burp Suite to capture evidence.

Frequently Asked Questions

How do I start hacking Cosmos?

Sign up on HackerOne, read the program policy carefully, review the in-scope assets listed above, and start testing. Always stay within scope and follow responsible disclosure guidelines.

Does Cosmos pay bounties?

Yes, Cosmos offers monetary rewards for valid security vulnerabilities.

What types of vulnerabilities does Cosmos accept?

Cosmos accepts reports for vulnerabilities found in their 12 in-scope assets. Common accepted vulnerability types include XSS, SQL injection, SSRF, IDOR, authentication bypass, and RCE. Check the program policy for specific exclusions.