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.

INFO

Published Date :

2026-03-24T14:13:26.107Z

Last Modified :

2026-03-24T15:24:34.995Z

Source :

f5
AFFECTED PRODUCTS

The following products are affected by CVE-2026-28753 vulnerability.

Vendors Products
F5
  • Nginx Open Source
  • Nginx Plus
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-28753.

URL Resource
https://my.f5.com/manage/s/article/K000160367 cve-icon cve-icon cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2026-28753 cve-icon
https://www.cve.org/CVERecord?id=CVE-2026-28753 cve-icon
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CVSS Vulnerability Scoring System

Detailed values of each vector for above chart.
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Detailed values of each vector for above chart.
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact