hookgate sits in front of systems that trust what it forwards, so security reports get priority.
Report privately through GitHub private vulnerability reporting. Do not open a public issue for a vulnerability.
You can expect an acknowledgement within 3 working days and an assessment within 10. Fixes ship as a patch release with a GitHub security advisory; reporters are credited unless they ask not to be.
Only the latest minor release receives security fixes.
In scope: anything that lets a request reach an upstream without passing its source's checks, leaks a secret (in logs, metrics, responses or timing), or lets one source affect another. Out of scope: denial of service by volume alone (put a rate limit in front of hookgate) and weaknesses of a sender's own signature scheme.