Lambda on it-learn.io | IT, Networking & Cybersecurity Bloghttps://blog.it-learn.io/tags/lambda/Recent content in Lambda on it-learn.io | IT, Networking & Cybersecurity BlogHugoen-usWed, 22 Apr 2026 00:00:00 +0000Serverless Injection: Attacking Lambda Functions Through Event Datahttps://blog.it-learn.io/posts/2026-04-22-serverless-injection-attacking-lambda-through-event-data/Wed, 22 Apr 2026 00:00:00 +0000https://blog.it-learn.io/posts/2026-04-22-serverless-injection-attacking-lambda-through-event-data/<p>Serverless functions are not exempt from injection vulnerabilities. The attack surface is different — instead of HTTP request parameters, the injection point is the event payload: the JSON object that arrives from S3, SQS, API Gateway, DynamoDB Streams, SNS, EventBridge, or any of the dozens of other event sources that can trigger a Lambda function.</p> <p>The challenge is that developers often apply strict validation to data arriving from external HTTP requests (API Gateway events) but treat data from internal event sources — an S3 event triggered by a bucket upload, an SQS message from another service — as implicitly trustworthy. This trust assumption is exactly what attackers exploit.</p>