CVE-2026-28753
3.7
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
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 Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| F5 | NGINX Open Source | 1.29.0 < 1.29.7 | affected |
| F5 | NGINX Open Source | 0.6.27 < 1.28.3 | affected |
| F5 | NGINX Plus | R36 < R36 P3 | affected |
| F5 | NGINX Plus | R35 < R35 P2 | affected |
| F5 | NGINX Plus | R34 < * | affected |
| F5 | NGINX Plus | R33 < * | affected |
| F5 | NGINX Plus | R32 < R32 P5 | affected |
Weaknesses
- CWE-93: CWE-93 Improper Neutralization of CRLF Sequences ('CRLF Injection')
ADP Enrichment
CISA ADP Vulnrichment
- SSVC:
- Exploitation: none
- Automatable: no
- Technical Impact: partial
References
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