Software security researchers are increasingly engaging with internet companies to hunt down vulnerabilities. Our bounty program gives a tip of the hat to these researchers and provides rewards of $30,000 or more for critical vulnerabilities.
If you have found a vulnerability, submit it here.
These are the current top 10 bounty hunters based on total points earned across all targets. For the full list of contributors, check out GitHub’s bounty hunters.
|1||30,750 pts Aleksandr Dobkin<img src=404 onerror=alert(document.domain)> @adob|
|2||28,500 pts joernchen @joernchen|
|3||20,000 pts Etienne Stalmans @staaldraad|
|4||16,000 pts Tanner @Cache-Money|
|5||15,600 pts Ioannis Kakavas @jkakavas|
|6||14,000 pts kyprizel @kyprizel|
|7||12,500 pts Orange Tsai @orangetw|
|8||10,200 pts Kamil Hismatullin @kamilhism|
|9||10,000 pts Vlad Ionescu @Vlaaaaaaad|
|10||10,000 pts Vyshakh Parakkat @vyshakh|
Check the list of bugs that have been classified as ineligible. Submissions which are ineligible will likely be closed as
Check the GitHub Changelog for recently launched features.
Never attempt non-technical attacks such as social engineering, phishing, or physical attacks against our employees, users, or infrastructure.
When in doubt, contact us at
By participating in GitHub’s Bug Bounty program (the “Program”), you acknowledge that you have read and agree to GitHub’s Terms of Service as well as the following:
you are not currently a GitHub employee or contractor, were not a GitHub employee or contractor within six months prior to submission, and you did not collaborate on your submission with anyone who was.
your participation in the Program will not violate any law applicable to you, or disrupt or compromise any data that is not your own.
you are solely responsible for any applicable taxes, withholding or otherwise, arising from or relating to your participation in the Program, including from any bounty payments.
GitHub reserves the right to terminate or discontinue the Program at its discretion.
Only test for vulnerabilities on sites you know to be operated by GitHub and are in-scope. Some sites hosted on subdomains of
GitHub.com are operated by third parties and should not be tested.
We cannot reward any individual on any U.S. sanctions list, or any individual residing in any U.S.-sanctioned country or region. For more information, please see https://www.hackerone.com/disclosure-guidelines.
Your research is covered by the GitHub Bug Bounty Program Legal Safe Harbor policy. In summary:
We consider security research and vulnerability disclosure activities conducted consistent with this policy as “authorized” conduct under the Computer Fraud and Abuse Act, the DMCA, and other applicable computer use laws such as Cal. Penal Code 502(c). We waive any potential DMCA claim against you for circumventing the technological measures we have used to protect the applications in this bug bounty program’s scope.
We want you to responsibly disclose through our bug bounty program, and don’t want researchers put in fear of legal consequences because of their good faith attempts to comply with our bug bounty policy. We cannot bind any third party, so do not assume this protection extends to any third party. If in doubt, ask us before engaging in any specific action you think might go outside the bounds of our policy.
Because both identifying and non-identifying information can put a researcher at risk, we limit what we share with third parties. We may provide non-identifying substantive information from your report to an affected third party, but only after notifying you and receiving a commitment that the third party will not pursue legal action against you. We will only share identifying information (name, email address, phone number, etc.) with a third party if you give your written permission.
If your security research as part of the bug bounty program violates certain restrictions in our site policies, the safe harbor terms permit a limited exemption.
Do not impact other users with your testing, this includes testing vulnerabilities in repositories or organizations you do not own. If you are attempting to find an authorization bypass, you must use accounts you own.
The following are never allowed and are ineligible for reward. We may suspend your GitHub account and ban your IP address for:
nmapscan against one host is allowed, but sending 65,000 requests in two minutes using Burp Suite Intruder is excessive.
Researching denial-of-service attacks is allowed and eligible for rewards only if you follow these rules:
Do not intentionally access others’ PII. If you suspect a service provides access to PII, limit queries to your own personal information.
Report the vulnerability immediately and do not attempt to access any other data. The GitHub Security team will assess the scope and impact of the PII exposure.
Limit the amount of data returned from services. For SQL injection, for example, limit the number of rows returned
You must delete all your local, stored, or cached copies of data containing PII as soon as possible. We may ask you to sign a certificate of deletion and confidentiality agreement regarding the exact information you accessed. This agreement will not affect your bounty reward.
Submissions must include written instructions for reproducing the vulnerability. Submissions without clear reproduction steps or which only include reproduction steps in video form may be ineligible for a reward.
When reporting vulnerabilities you must keep all information on HackerOne. Do not post information to video-sharing or pastebin sites. Videos and images can be uploaded directly via HackerOne.
For vulnerabilities involving personally identifiable information, please explain the kind of PII you believe is exposed and limit the amount of PII data included in your submissions. For textual information and screenshots, please only include redacted data in your submission.
During the course of an investigation, it may take time to resolve the issue you have reported. We ask that you refrain from publicly disclosing details regarding an issue you’ve reported until the fix has been publicly made available.
All reward amounts are determined by our severity guidelines.
When duplicates occur, we only award the first report that was received (provided that it can be fully reproduced).
You are free to publish write-ups about your vulnerability and GitHub will not limit what you write. We may pay out your reward before the vulnerability is patched so we may ask that you delay publishing to keep other GitHub users safe.
Medium, high, and critical severity issues may be written up on the GitHub Bug Bounty site and included in our leaderboard. We do not currently post write-ups for low severity vulnerabilities.
GitHub is a CVE Numbering Authority (CNA) for GitHub Enterprise Server. Eligible Bug Bounty submissions that affect GitHub Enterprise Server may be assigned CVEs. These CVEs will be shared with submitters via HackerOne, included in bounty write-ups and listed in the GitHub Enterprise Server release notes.
You may prefer the reward go toward helping others. If you choose to do so, GitHub will donate your reward to an established 501(c)(3) charitable organization of your choice. GitHub will also match your donation - subject to our discretion. Any rewards that go unclaimed after 12 months will be donated to a charity of GitHub’s choosing.
In addition to our scope, we want to share a high-level overview of GitHub's services:
GitHub runs a number of services but only submissions under the following domains are eligible for rewards. Any GitHub-owned domains not listed below are not in-scope, not eligible for rewards and not covered by our legal safe harbor.
All bounty submissions are rated by GitHub using a purposefully simple scale. Each vulnerability is unique but the following is a rough guideline we use internally for rating and rewarding submissions:
Critical severity issues present a direct and immediate risk to a broad array of our users or to GitHub itself. They often affect relatively low-level/foundational components in one of our application stacks or infrastructure. For example:
The upper bound for critical vulnerabilities, $30,000, is only a guideline and GitHub may reward higher amounts for exceptional reports.
High severity issues allow an attacker to read or modify highly sensitive data that they are not authorized to access. They are generally more narrow in scope than critical issues, though they may still grant an attacker extensive access. For example:
Medium severity issues allow an attacker to read or modify limited amounts of data that they are not authorized to access. They generally grant access to less sensitive information than high severity issues. For example:
Low severity issues allow an attacker to access extremely limited amounts of data. They may violate an expectation for how something is intended to work, but it allows nearly no escalation of privilege or ability to trigger unintended behavior by an attacker. For example:
Our security and development teams take many factors into account when determining a reward. These factors include the complexity of successfully exploiting the vulnerability, the potential exposure, as well as the percentage of impacted users and systems. Sometimes an otherwise critical vulnerability has a very low impact simply because it is mitigated by some other component, e.g. requires user interaction, an obscure web browser, or would need to be combined with another vulnerability that does not currently exist. Additionally, at least two GitHub security engineers agree on the severity and amount before a payout is made.
You can certainly attach a video if you believe it will clarify your submission. However, all submissions must also include step-by-step instructions to reproduce the bug. The security team will let you know if we think a video will clarify your report. Submissions which only include video reproduction steps will have a longer response time and we may close your submission as
You may get a response that appears to be from a bot. The bot does some work for us, but only when we tell it to. We “do our own stunts” at GitHub Security. An application security engineer at GitHub triages each submission. In most cases, we use the bot to automate messaging and other tasks for us. Rest assured, a human did look at your submission.
GitHub’s Bug Bounty program is designed to both reward individual researchers and increase the security of all GitHub users. We don’t believe that disclosing GitHub vulnerabilities to third parties achieves either of those goals. As a result, any vulnerabilities that are disclosed to third-party before being submitted to our program are ineligible for rewards.
In addition to giving researchers money, we are trying to make this fun. We assign a point value to each vulnerability and list it on this site. The researchers with the most points are listed on our leaderboard. While we use many of the same metrics when determining point value as for dollar value, other non-tangible factors are considered as well. For example, if you provide an awesome writeup of a vulnerability with a functional POC that will be factored in.
Please still send us your vulnerability! We will only publish your submission after your approval. To be visible within the leaderboard you must provide us with a GitHub username. This allows us to link submissions to a single user and generate your sweet profile page.
We do not always update HackerOne with the assessed severity because we track that information internally. Our payout guidelines and the value of the reward dictate our assessment of severity, not the severity on HackerOne.
If you absolutely believe encrypting the message is necessary, please read our instructions and caveats for PGP submissions.
As noted in the
performing your research section, denial of service research is best done on your own instance of GHES. Causing an availability issue is simply not helpful. We are only interested in denial of service issues at the application layer (logic bombs, ReDoS, etc.). Volumetric attack submissions are not eligible for rewards and we may suspend your GitHub account or temporarily ban your IP address.