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HTTP/1.1 Request Smuggling Defense using Cryptographic Message Binding
draft-nygren-httpbis-http11-request-binding-00

Document Type Expired Internet-Draft (individual)
Expired & archived
Authors Erik Nygren , Mike Bishop
Last updated 2026-04-19 (Latest revision 2025-10-16)
RFC stream (None)
Intended RFC status (None)
Formats
Stream Stream state (No stream defined)
Consensus boilerplate Unknown
RFC Editor Note (None)
IESG IESG state Expired
Telechat date (None)
Responsible AD (None)
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft is available in these formats:

Abstract

HTTP/1.1 Message Binding adds new hop-by-hop header fields that are cryptographically bound to requests and responses. The keys used are negotiated out-of-band from the HTTP datastream (such as via TLS Exporters). These header fields allow endpoints to detect and mitigate desynchronization attacks, such as HTTP Request Smuggling, that exist due to datastream handling differences.

Authors

Erik Nygren
Mike Bishop

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)