Low3.7Red Hat & Ubuntu Linux
NGINX Plus and NGINX Open Source: Request manipulation via header injection in SMTP upstream requests
CVE-2026-28753 Published Mar 24, 2026
CVE-2026-28753
Affected products & platforms
Red Hat & Ubuntu LinuxUnclassified
Summary
NGINX Plus and NGINX Open Source: Request manipulation via header injection in SMTP upstream requests. Red Hat rates this low (CVSS 3.7). Weakness: CWE-93. Affected package(s): nginx-main. Resolved in Red Hat advisory RHSA-2026:8346 — update the affected packages (`sudo dnf update`).
Affected versions
- nginx-main-1.30.0-1.hum1
Official advisory · high-confidence parse· fetched 6 hours ago·verify at source
Fixed versions
- RHSA-2026:8346
Official advisory · high-confidence parse· fetched 6 hours ago·verify at source
Mitigation checklist
Recommended fix / mitigation
- Update the affected package(s) to the fixed version shipped in RHSA-2026:8346 (`sudo dnf update` / `yum update`).
Official advisory · high-confidence parse· fetched 6 hours ago·verify at source
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