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CVE PROGRAM SOURCE RECORD6.3 Medium

CVE-2026-28753

NGINX ngx_mail_proxy_module vulnerability

Read JSON ↗CVE.org ↗
Status
Published
Published
Updated
Assigning organization
f5

Description

NGINX Plus and NGINX Open Source have a vulnerability in the ngx_mail_smtp_module module due to the improper handling of CRLF sequences in DNS responses. This allows an attacker-controlled DNS server to inject arbitrary headers into SMTP upstream requests, leading to potential request manipulation. 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
  • 0.6.27 to < 1.28.3affected

F5 NGINX Plus

Default version status: unknown

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

References