Mongoose: HTTP/1.0 detection off-by-one enables request smuggling via chunked TE
Mongoose is an embedded web server and network library. Prior to 7.22, a remote unauthenticated attacker can exploit an HTTP/1.0 reverse-proxy deployment by sending a request with Transfer-Encoding: chunked and conflicting framing. The http_cb() function in src/http.c tests hm.proto.len with an impossible greater-than-…
Severity critical: primary CNA CVSS 9.1 v3.1 (worst CNA-provided scenario) Not listed in this KEV snapshot. Forecast present in this snapshot.
Published 2026-08-20T17:37:54.505Z. Updated 2026-08-21T21:46:47.832Z.