CVE-2021-38384: Serverless Offline Project Serverless Offline

Critical severity, CVSS 9.8. EPSS: 1.5% chance of exploitation in the next 30 days.

Serverless Offline 8.0.0 returns a 403 HTTP status code for a route that has a trailing / character, which might cause a developer to implement incorrect access control, because the actual behavior within the Amazon AWS environment is a 200 HTTP status code (i.e., possibly greater than expected permissions).

Affected products

Published 2021-08-10. Last modified 2026-06-17.