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Security Advisories

CVE-2026-27651

NVD

https://nvd.nist.gov/vuln/detail/CVE-2026-27651

Severity

Unknown
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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.

References

Affected packages

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