CVE-2026-73256— Mongoose HTTP/1.0 检测偏移错误导致请求走私漏洞
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一、 漏洞 CVE-2026-73256 基础信息
漏洞信息
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Vulnerability Title
Mongoose: HTTP/1.0 detection off-by-one enables request smuggling via chunked TE
来源: CVE Program / CVE List V5
Vulnerability Description
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.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
来源: CVE Program / CVE List V5
Vulnerability Type
HTTP请求的解释不一致性(HTTP请求私运)
来源: CVE Program / CVE List V5
受影响产品
二、漏洞 CVE-2026-73256 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2026-73256 补丁与修复 (1)
CVE-2026-73256 厂商安全公告 (1)
CVE-2026-73256 厂商页面 (1)
同批安全公告 · cesanta · 2026-08-20 · 共 8 条
| CVE-2026-73251 | 9.3 CRITICAL | Mongoose 内置TLS证书链未验签漏洞 |
| CVE-2026-73257 | 9.1 CRITICAL | Mongoose Content-Length与Transfer-Encoding共存导致请求走私漏洞 |
| CVE-2026-73253 | 9.1 CRITICAL | Mongoose TLS主机名验证绕过漏洞 |
| CVE-2026-73258 | 6.5 MEDIUM | Mongoose multipart解析逻辑错误漏洞 |
| CVE-2026-73255 | 6.5 MEDIUM | Mongoose SSI包含指令路径穿越漏洞 |
| CVE-2026-73254 | 5.4 MEDIUM | Mongoose 目录列表未转义文件名存储型XSS漏洞 |
| CVE-2026-73259 | 5.4 MEDIUM | Mongoose 目录列表渲染中反射型XSS漏洞 |
IV. Related Vulnerabilities
V. Comments for CVE-2026-73256
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