Detections
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Unity Linux 20.1050e Security Update: nginx (UTSA-2026-014274)
medium Nessus Plugin ID 309992
Synopsis
The Unity Linux host is missing one or more security updates.Description
The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-014274 advisory.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.
Tenable has extracted the preceding description block directly from the Unity Linux security advisory.
Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.
Solution
Update the affected nginx package.See Also
https://atomgit.com/src-openeuler/nginx/issues/67
Plugin Details
Severity: Medium
ID: 309992
File Name: unity_linux_UTSA-2026-014274.nasl
Version: 1.1
Type: Local
Published: 4/23/2026
Updated: 4/23/2026
Supported Sensors: Nessus
Risk Information
VPR
Risk Factor: Low
Score: 2.2
CVSS v2
Risk Factor: Low
Base Score: 2.6
Temporal Score: 1.9
Vector: CVSS2#AV:N/AC:H/Au:N/C:N/I:P/A:N
CVSS Score Source: CVE-2026-28753
CVSS v3
Risk Factor: Low
Base Score: 3.7
Temporal Score: 3.2
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C
CVSS v4
Risk Factor: Medium
Base Score: 6.3
Threat Score: 1.7
Threat Vector: CVSS:4.0/E:U
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
Vulnerability Information
Required KB Items: Host/local_checks_enabled, Host/cpu, Host/UOS-Server/release, Host/UOS-Server/rpm-list
Exploit Ease: No known exploits are available
Patch Publication Date: 4/23/2026
Vulnerability Publication Date: 3/24/2026
Reference Information
CVE: CVE-2026-28753