Detections
Analytics
nginx 1.3.0 < 1.28.2 / 1.29.x < 1.29.5 SSL Upstream Injection
high Nessus Plugin ID 304671
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Synopsis
The remote web server is affected by a vulnerability.Description
According to its Server response header, the installed version of nginx is 1.3.0 prior to 1.28.2, or 1.29.x prior to 1.29.5. It is, therefore, affected by the following issue :- A vulnerability exists in NGINX OSS and NGINX Plus when configured to proxy to upstream Transport Layer Security (TLS) servers. An attacker with a man-in-the-middle (MITM) position on the upstream server side--along with conditions beyond the attacker's control--may be able to inject plain text data into the response from an upstream proxied server. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
(CVE-2026-1642)
Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.
Solution
Upgrade to nginx 1.28.2 / 1.29.5 or later.See Also
Plugin Details
Severity: High
ID: 304671
File Name: nginx_CVE-2026-1642.nasl
Version: 1.3
Type: Combined
Agent: unix
Family: Web Servers
Published: 4/2/2026
Updated: 4/6/2026
Supported Sensors: Nessus Agent, Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 4.4
CVSS v2
Risk Factor: High
Base Score: 7.1
Temporal Score: 5.3
Vector: CVSS2#AV:N/AC:M/Au:N/C:N/I:C/A:N
CVSS Score Source: CVE-2026-1642
CVSS v3
Risk Factor: Medium
Base Score: 5.9
Temporal Score: 5.2
Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C
CVSS v4
Risk Factor: High
Base Score: 8.2
Threat Score: 4.6
Threat Vector: CVSS:4.0/E:U
Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
Vulnerability Information
CPE: cpe:/a:igor_sysoev:nginx
Required KB Items: installed_sw/nginx
Exploit Ease: No known exploits are available
Patch Publication Date: 2/4/2026
Vulnerability Publication Date: 2/4/2026
Reference Information
CVE: CVE-2026-1642
IAVA: 2026-A-0280