What it means
Serverless event trigger security protects the queues, topics, schedules, storage events, webhooks, API routes, and other sources that invoke functions or workflows.
Why it matters
A trusted function can still be abused when an attacker can replace, forge, replay, or overproduce the event that activates it.
Practical focus
- Authenticate and authorize event sources
- Validate schema, origin, and replay protections
- Limit trigger-to-function permissions
- Monitor changes to event routing and subscriptions
Common mistakes
- Trusting an event because it came through a managed service
- Giving triggers broad invocation rights
- Ignoring poison-message and replay scenarios
- Monitoring function code but not event configuration
Certification relevance
This subject appears in or supports the following certification bodies of knowledge: