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I. Basic Information for CVE-2026-27651
Vulnerability Information

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Vulnerability Title
NGINX ngx_mail_auth_http_module vulnerability
Source: NVD (National Vulnerability Database)
Vulnerability Description
When the ngx_mail_auth_http_module module is enabled on NGINX Plus or NGINX Open Source, undisclosed requests can cause worker processes to terminate. This issue may occur when (1) CRAM-MD5 or APOP authentication is enabled, and (2) the authentication server permits retry by returning the Auth-Wait response header. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
空指针解引用
Source: NVD (National Vulnerability Database)
Vulnerability Title
F5 NGINX Plus和F5 NGINX Open Source 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
F5 NGINX Plus和F5 NGINX Open Source都是美国F5公司的产品。F5 NGINX Plus是一个基于软件的应用程序交付平台。F5 NGINX Open Source是一个高性能Web服务器、反向代理服务器、负载均衡器和API网关。 F5 NGINX Plus和F5 NGINX Open Source存在代码问题漏洞,该漏洞源于ngx_mail_auth_http_module模块处理未公开请求时可能导致工作进程终止。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
VendorProductAffected VersionsCPESubscribe
F5NGINX Open Source 1.29.0 ~ 1.29.7 -
F5NGINX Plus R36 ~ R36 P3 -
II. Public POCs for CVE-2026-27651
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III. Intelligence Information for CVE-2026-27651
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IV. Related Vulnerabilities
V. Comments for CVE-2026-27651

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