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CVE PROGRAM SOURCE RECORD8.7 High

CVE-2026-27651

NGINX ngx_mail_auth_http_module vulnerability

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Status
Published
Published
Updated
Assigning organization
f5

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

F5 NGINX Open Source

Default version status: unknown

  • 1.29.0 to < 1.29.7affected
  • 0.5.15 to < 1.28.3affected

F5 NGINX Plus

Default version status: unaffected

  • R36 to < R36 P3affected
  • R35 to < R35 P2affected
  • R34 to < *affected
  • R33 to < *affected
  • R32 to < R32 P5affected

References