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Acknowledged

LIN1021-22001 : Security Advisory - nginx - CVE-2026-27651

Created: Mar 25, 2026 Updated: Apr 20, 2026

Found In Version: 10.21.20.2

Severity: Standard

Applicable for: Wind River Linux LTS 21

Component/s: Userspace

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.