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CVE-2026-63626— Mongoose: ppp_handle_ipv6cp() uses attacker-controlled length without bounds check — OOB read and heap overflow (PPP/PPPoE, MG_ENABLE_IPV6)

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, ppp_handle_ipv6cp() in src/l2_ppp.c trusts the 16-bit IPv6CP len field without checking it against the received payload size. On a PPP or PPPoE link using MG_ENABLE_TCPIP and MG_ENABLE_IPV6

CVSS 8.8 · 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-2026-63626 基础信息

漏洞信息

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Vulnerability Title
Mongoose: ppp_handle_ipv6cp() uses attacker-controlled length without bounds check — OOB read and heap overflow (PPP/PPPoE, MG_ENABLE_IPV6)
来源: CVE Program / CVE List V5
Vulnerability Description
Mongoose is an embedded web server and network library. Prior to 7.23, ppp_handle_ipv6cp() in src/l2_ppp.c trusts the 16-bit IPv6CP len field without checking it against the received payload size. On a PPP or PPPoE link using MG_ENABLE_TCPIP and MG_ENABLE_IPV6, an unauthenticated adjacent peer can complete the required LCP exchange and send a short Configure-Request with an oversized length, causing ppp_tx_frame() to read beyond recv_queue.buf and write beyond tx.buf. The same length misuse can also expose adjacent heap bytes in a reply or hang the event loop through find_opt(). This issue is fixed in version 7.23.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
来源: CVE Program / CVE List V5
Vulnerability Type
堆缓冲区溢出
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-2026-63626 的公开POC

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三、漏洞 CVE-2026-63626 的情报信息

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CVE-2026-63626 补丁与修复 (1)

CVE-2026-63626 厂商页面 (1)

CVE-2026-63626 其他参考 (1)

同批安全公告 · cesanta · 2026-10-14 · 共 4 条

CVE-2026-73261 7.5 HIGH Mongoose: handle_opt() missing opts[1] > len check — 1-byte OOB read corrupts TCP MSS, sil
CVE-2026-73260 7.5 HIGH Mongoose: Out-of-bounds Read via length-counter underflow in built-in TLS X.509 DER parser
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-122

V. Comments for CVE-2026-63626

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