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CVE-2026-28753

NGINX ngx_mail_proxy_module vulnerability

Published: Mar 24, 2026Updated: Mar 26, 2026 Sources: CVE List NVD BDUCWE-93
3.7LOW
NVD MITRE
EPSS Score
0.3%
Top 81.9%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
OpenVAS

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:HPR:NUI:NS:UC:NI:LA:N
Exploitability
AV:NAttack Vector
Network
AC:HAttack Complexity
High
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:LIntegrity
Low
A:NAvailability
None
Open in CVSS calculator →

Weaknesses

CWE-93

Affected Products

F5
commercial·US
NGINX Open SourceOn-premWeb App
Networking Infrastructure / load-balancer-proxy
NGINX PlusOn-premWeb App
Networking Infrastructure / load-balancer-proxy
NGINX Inc.
commercial·USaka nginx plus, njs, nginx
NGINX Plus
Networking Infrastructure
NGINX Open Source
Networking Infrastructure
ООО «Ред Софт»
commercial·RUaka red soft
РЕД ОСOn-premOS
Operating Systems / linux-distro
АО «ИВК»
commercial·RUaka ivk
АЛЬТ СП 10On-premOS
Operating Systems / linux-distro
ООО "Веб-Сервер"
commercial·RUaka angie adc, angie pro, angie
AngieOn-prem
Networking Infrastructure / load-balancer-proxy
and 3 more affected products View all →

Exploitability

Official Patch Available
Is your org exposed to CVE-2026-28753?We can run the check for you — a free external exposure review, no install. Check my exposure

References

https://my.f5.com/manage/s/article/K000160367
my.f5.com
https://my.f5.com/manage/s/article/K000160367
my.f5.com
https://angie.software/angie/docs/oss_changes/#angie
angie.software
and 3 more references View all →

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