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BDVDB
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Vulnerabilities

CVE-2026-28753 | BDVDB-2026-322274 Detail

F5NGINX Open Source

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.

Impact#

Per CVSS v3.1: confidentiality impact none, integrity impact low, availability impact none. Attack vector: network.

Weaknesses#

  • CWE-93 Improper Neutralization of CRLF Sequences ('CRLF Injection')

References#

Exploit#

No public exploit known

History#

  1. Version 1Record published in the CVE List.