HTTP Request Smuggling

Definitions

1. HTTP Request Smuggling is an attack technique in which an adversary desynchronizes front-end and back-end HTTP parsing to hide or splice requests. Defenders analyze it to understand prerequisites, affected trust boundaries, and likely telemetry, then reduce risk with layered controls such as validation, hardening, rate limits, segmentation, and high-quality logging for investigation and response.

   In plain English: HTTP Request Smuggling is a way attackers abuse systems or trust relationships, and defenders counter it with better design, validation, monitoring, and layered controls.

   Example: "During the assessment, the team simulated HTTP Request Smuggling against a staging service, confirmed the weakness with logs and telemetry, and then added tighter validation, safer defaults, and monitoring so the same technique would trigger an alert in production."

Related Terms

• Authentication
• OTP
• CAPTCHA Bypass
• Cookie Poisoning
• HTTP Parameter Pollution
• HTTP Response Splitting
• HTTPS Stripping
• Open Redirect