CVE-2026-73256

01/תיאור (מקור, אנגלית)

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-eight condition even though mg_http_parse() requires an eight-byte protocol string, so is_http_1_0 is never set. Mongoose consequently processes chunked encoding that an HTTP/1.0 proxy can ignore, enabling request smuggling and unauthorized access or state changes. This issue is fixed in version 7.22.

02/מוצרים מושפעים

cesanta: mongoose

03/קישורים4

• github.com/cesanta/mongoose/security/advisories/GHSA-mgp5-rjrv‮… ExploitVendor Advisory
• github.com/cesanta/mongoose/commit/a9df523f76f43a38bd53b4232b9‮… Patch
• github.com/cesanta/mongoose/pull/3611 Issue TrackingPatch
• github.com/cesanta/mongoose/releases/tag/7.22 Release Notes