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.
References
| Link | Resource |
|---|---|
| https://my.f5.com/manage/s/article/K000160367 | Vendor Advisory |
Configurations
Configuration 1 (hide)
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Configuration 2 (hide)
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History
26 Mar 2026, 21:15
| Type | Values Removed | Values Added |
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| Summary |
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| CPE | cpe:2.3:a:f5:nginx_plus:r32:p2:*:*:*:*:*:* cpe:2.3:a:f5:nginx_plus:r33:*:*:*:*:*:*:* cpe:2.3:a:f5:nginx_plus:r36:p2:*:*:*:*:*:* cpe:2.3:a:f5:nginx_plus:r32:p3:*:*:*:*:*:* cpe:2.3:a:f5:nginx_plus:r36:*:*:*:*:*:*:* cpe:2.3:a:f5:nginx_open_source:*:*:*:*:*:*:*:* cpe:2.3:a:f5:nginx_plus:r35:*:*:*:*:*:*:* cpe:2.3:a:f5:nginx_plus:r36:p1:*:*:*:*:*:* cpe:2.3:a:f5:nginx_plus:r32:p4:*:*:*:*:*:* cpe:2.3:a:f5:nginx_plus:r33:p3:*:*:*:*:*:* cpe:2.3:a:f5:nginx_plus:r34:p1:*:*:*:*:*:* cpe:2.3:a:f5:nginx_plus:r35:p1:*:*:*:*:*:* cpe:2.3:a:f5:nginx_plus:r34:*:*:*:*:*:*:* cpe:2.3:a:f5:nginx_plus:r34:p2:*:*:*:*:*:* cpe:2.3:a:f5:nginx_plus:r33:p2:*:*:*:*:*:* cpe:2.3:a:f5:nginx_plus:r32:p1:*:*:*:*:*:* cpe:2.3:a:f5:nginx_plus:r33:p1:*:*:*:*:*:* |
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| References | () https://my.f5.com/manage/s/article/K000160367 - Vendor Advisory | |
| First Time |
F5 nginx Open Source
F5 nginx Plus F5 |
24 Mar 2026, 15:16
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-03-24 15:16
Updated : 2026-03-26 21:15
NVD link : CVE-2026-28753
Mitre link : CVE-2026-28753
CVE.ORG link : CVE-2026-28753
JSON object : View
Products Affected
f5
- nginx_plus
- nginx_open_source
CWE
CWE-93
Improper Neutralization of CRLF Sequences ('CRLF Injection')