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F5 NGINX PlusNGINX ngx_mail_auth_http_module vulnerability

Risk 51
Severity
8.7
Null Pointer Dereference
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Last updated 6 June 2026

1 / 5
Source: Ubuntu
First published (updated )
CVE-2026-27651

F5 NGINX PlusWhen the ngx_mail_auth_http_module module is enabled on NGINX Plus or NGINX Open Source, undisclosed…

Risk 17
Severity
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

When the ngxmailauthhttpmodule 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.

First published (updated )
Advisory
F5-K000160383

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