cvedb.io
CVE-2026-28753
LOW · CVSS 3.7
EPSS exploitation probability: 0%
Published 2026-03-24T15:16:33.560 · Last modified 2026-06-17T10:28:59.190

Summary

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

f5 — nginx_plus

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References

This product uses data from the NVD API but is not endorsed or certified by the NVD. Informational only; not professional security advice.