CVE-2026-27651
High · 7.5CVSS
7.5
EPSS
1.7%
Published
Mar 24, 2026
CISA due date
—
The record
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.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
|---|---|---|---|
| openSUSE:Tumbleweed | nginx | 0 | 1.29.7-1.1 |
Related vulnerabilities
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- CVE-2026-42946 A vulnerability exists in the ngx_http_scgi_module and ngx_http_uwsgi_module modules that… Also affects nginx
- CVE-2026-42945 NGINX Plus and NGINX Open Source have a vulnerability in the ngx_http_rewrite_module… Also affects nginx
- CVE-2026-42934 NGINX Plus and NGINX Open Source have a vulnerability in the ngx_http_charset_module… Also affects nginx
- CVE-2026-42926 When NGINX Open Source is configured to proxy HTTP/2 traffic by setting… Also affects nginx
- CVE-2026-40701 NGINX Plus and NGINX Open Source have a vulnerability in the ngx_http_ssl_module module… Also affects nginx
- CVE-2026-40460 When NGINX Plus or NGINX Open Source are configured to use the HTTP/3 QUIC module, an… Also affects nginx