EUVD-2026-14885
GHSA-ggr6-fmr8-2m8g
CVSS Vector
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Lifecycle Timeline
4Tags
Description
NGINX Plus and NGINX Open Source have a vulnerability in the ngx_mail_smtp_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.
Analysis
NGINX Plus and NGINX Open Source contain an improper handling vulnerability in the ngx_mail_smtp_module that allows DNS response injection through malformed CRLF sequences. An attacker controlling a DNS server can inject arbitrary headers into SMTP upstream requests, potentially manipulating mail routing and message content. …
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Remediation
Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Monitor vendor channels for patch availability.
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External POC / Exploit Code
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