Rewarding security bugs in our open source projects
Square recognizes the important contributions the security research community can make. Part of keeping Square's customers safe is making sure that we find and fix any security issues in our open source projects. If you find any vulnerabilities in any of our participating open source projects, send us a report. Even better, send us a fix!
Note that this program is to report issues in our open source projects. If you believe you have discovered a security vulnerability in one of Square's domains (squareup.com, square.com, or cash.me) or mobile applications (Square Point of Sale, Square Cash App), please report them to our other Square bug bounty program.
Attributes of a good report
- Detailed explanation & proof-of-concept for the bug
- Include specific source code references for the issue from our GitHub
- Include repository, release version, branch and other information
- Describe the real-world impact/exploitability of the bug
- Issues related to software not under our control (such as external dependencies) are not eligible for a reward.
- Most of our open source development is publicly visible. Reports related to an issue being fixed in a branch or being tracked in a public way will therefore not be eligible for a bounty.
- Reports of issues without a proof-of-concept or clear path to exploitation. You may still report these, but will not be eligible for a monetary reward.
- Issues which can only be reproduced on specific combinations of hardware or software not used by Square.
How to send a fix
Please do not open a pull request or GitHub ticket to fix an issue you're reporting. This would unnecessarily reveal any potential vulnerabilities. Instead, if you'd like to send us a fix, attach a patch file to the issue you open. You'll need to sign our Individual Contributor License Agreement before any patches can be accepted.
Rewards range from $100 to $10,000 depending on the type of issue and impact. We prioritize and reward issues based on the real-world impact to our software and systems as operated by Square. The values below represent upper bounds and rewards may vary in practice.
Reward RangeLast updated
|Technical severity||Reward range|
|p1 Critical||$1,000 - $10,000|
|p2 Severe||$750 - $750|
|p3 Moderate||$500 - $500|
|p4 Low||$100 - $100|
Projects which are hosted in Square's GitHub organization and which contain a
BUG-BOUNTY.md file in the root directory are in scope. Note that we only reward issues found in the latest master branch or release of a project. Outdated releases, development branches, pull requests, or similar are excluded from the bounty.
Currently, the projects in scope are:
- git-fastclone: It's git clone --recursive on steroids
- Go-JOSE: Go library to encrypt/decrypt data in JOSE formats
- Keywhiz: A system for distributing and managing secrets
- KeywhizFs: A FUSE module/filesystem for Keywhiz
- KeySync: Keysync periodically downloads secrets from Keywhiz
- OkHttp: An HTTP+HTTP/2 client for Android and Java applications
- Okio: A modern I/O API for Java
- pam_krb_cache: PAM module for ksu style Kerberos authentication in sudo
- ghostunnel: Simple SSL/TLS proxy with mutual authentication for securing non-TLS services
- rails-auth: Modular resource-based authentication and authorization for Rails/Rack
- Retrofit: Type-safe HTTP client for Android and Java
- Squalor: Go SQL utility library
- Valet: Securely store data in the iOS, tvOS, or macOS Keychain
- Wire: Clean, lightweight protocol buffers for Android and Java
If you have data that you feel is particularly sensitive and would like to encrypt before sending it to our bug bounty, please use the following OpenPGP key for encryption:
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