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CVE-2026-73260— Mongoose: Out-of-bounds Read via length-counter underflow in built-in TLS X.509 DER parser

一分钟漏洞结论

影响对象
cesanta mongoose
利用判断
尚无明确在野利用证据，仍需结合暴露面评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。

Mongoose is an embedded web server and network library. Prior to 7.23, the built-in TLS certificate parser selected by MG_TLS_BUILTIN fails to verify that a long-form DER element length fits within the remaining certificate buffer. In mg_der_to_tlv() and mg_de

CVSS 7.5 · High

影响版本矩阵 1

厂商产品 版本范围状态
cesanta mongoose < 7.23 affected
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一、 漏洞 CVE-2026-73260 基础信息

漏洞信息

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Vulnerability Title
Mongoose: Out-of-bounds Read via length-counter underflow in built-in TLS X.509 DER parser
来源: CVE Program / CVE List V5
Vulnerability Description
Mongoose is an embedded web server and network library. Prior to 7.23, the built-in TLS certificate parser selected by MG_TLS_BUILTIN fails to verify that a long-form DER element length fits within the remaining certificate buffer. In mg_der_to_tlv() and mg_der_next(), a peer-controlled length can advance the parser beyond the certificate and underflow the remaining uint32_t length, causing mg_tls_parse_cert_der() to continue walking an invalid pointer. An unauthenticated malicious TLS server, or a client presenting a certificate to a server configured for client certificates, can trigger an out-of-bounds read and denial of service during the handshake. This issue is fixed in version 7.23.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
来源: CVE Program / CVE List V5
Vulnerability Type
跨界内存读
来源: CVE Program / CVE List V5

受影响产品

厂商 产品 影响版本 CPE 订阅
cesanta mongoose < 7.23 -

二、漏洞 CVE-2026-73260 的公开POC

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三、漏洞 CVE-2026-73260 的情报信息

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CVE-2026-73260 补丁与修复 (1)

CVE-2026-73260 厂商页面 (1)

CVE-2026-73260 其他参考 (1)

同批安全公告 · cesanta · 2026-10-14 · 共 4 条

CVE-2026-63626 8.8 HIGH Mongoose: ppp_handle_ipv6cp() uses attacker-controlled length without bounds check — OOB r
CVE-2026-73261 7.5 HIGH Mongoose: handle_opt() missing opts[1] > len check — 1-byte OOB read corrupts TCP MSS, sil
CVE-2026-73252 7.5 HIGH Mongoose: Unauthenticated remote heap out-of-bounds read in built-in TLS: off-by-one lengt

IV. Related Vulnerabilities

Same product: mongoose
Same vendor: cesanta
Same weakness: CWE-125

V. Comments for CVE-2026-73260

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