VDB
ALPINE-CVE-2026-28753
ALPINE-CVE-2026-28753
PUBLISHED
CVSS 6.300000190734863 MEDIUM
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.
Risk Scores
CVSS 4.0
6.300000190734863
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
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Alpine:v3.22 | nginx | 0, 0.8.53-r0, 0.8.54-r0 |
| Alpine:v3.23 | nginx | 1.24.0-r13, 1.24.0-r14, 1.24.0-r15 |
| Alpine:v3.24 | nginx | 0 |
Timeline
- Mar 24, 2026 CVE Published
- Apr 30, 2026 Distribution Patch
- Jun 17, 2026 CVE Updated