An issue was discovered in Akamai Ghost, as used for the Akamai CDN platform before 2025-03-26. Under certain circumstances, a client making an HTTP/1.x OPTIONS request with an "Expect: 100-continue" header, and using obsolete line folding, can lead to a discrepancy in how two in-path Akamai servers interpret the request, allowing an attacker to smuggle a second request in the original request body.
https://www.rfc-editor.org/rfc/rfc9112.html#name-obsolete-line-folding
https://www.blackhat.com/us-25/briefings/schedule/#http1-must-die-the-desync-endgame-45103
https://www.akamai.com/blog/security/cve-2025-32094-http-request-smuggling
https://developer.mozilla.org/en-US/docs/Web/HTTP/Reference/Status/100