Webhook signature verify cheatsheet: open ingest URLs are public agent triggers
blaizedsouza · x · 2026-09-12
A production AI/DevOps security post argues that an open webhook ingest URL is a public agent trigger — anyone on the internet can start a run — so the author now rejects any webhook failing signature checks. The cheatsheet: require a signature header, keep secrets in a vault, verify before parsing the body, reject and log failures, rotate secrets on a schedule, and never trust source IP alone. Core principle: identity first, work second.
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