Detections
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Amazon Linux 2 : nginx, --advisory ALAS2NGINX1-2026-010 (ALASNGINX1-2026-010)

high Nessus Plugin ID 299565

Synopsis

The remote Amazon Linux 2 host is missing a security update.

Description

The version of nginx installed on the remote host is prior to 1.28.2-1. It is, therefore, affected by a vulnerability as referenced in the ALAS2NGINX1-2026-010 advisory.

 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)

Tenable has extracted the preceding description block directly from the tested product 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

Run 'yum update nginx' or or 'yum update --advisory ALAS2NGINX1-2026-010' to update your system.

See Also

https://alas.aws.amazon.com//AL2/ALAS2NGINX1-2026-010.html

https://alas.aws.amazon.com/faqs.html

https://explore.alas.aws.amazon.com/CVE-2026-1642.html

Plugin Details

Severity: High

ID: 299565

File Name: al2_ALASNGINX1-2026-010.nasl

Version: 1.1

Type: local

Agent: unix

Published: 2/19/2026

Updated: 2/19/2026

Supported Sensors: Continuous Assessment, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: Medium

Base Score: 5.4

Temporal Score: 4

Vector: CVSS2#AV:N/AC:H/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: p-cpe:/a:amazon:linux:nginx, p-cpe:/a:amazon:linux:nginx-core, p-cpe:/a:amazon:linux:nginx-mod-mail, p-cpe:/a:amazon:linux:nginx-mod-http-perl, p-cpe:/a:amazon:linux:nginx-mod-stream, p-cpe:/a:amazon:linux:nginx-mod-http-image-filter, p-cpe:/a:amazon:linux:nginx-all-modules, p-cpe:/a:amazon:linux:nginx-mod-http-xslt-filter, cpe:/o:amazon:linux:2, p-cpe:/a:amazon:linux:nginx-debuginfo, p-cpe:/a:amazon:linux:nginx-filesystem, p-cpe:/a:amazon:linux:nginx-mod-devel, p-cpe:/a:amazon:linux:nginx-mod-http-geoip

Required KB Items: Host/local_checks_enabled, Host/AmazonLinux/release, Host/AmazonLinux/rpm-list

Exploit Ease: No known exploits are available

Patch Publication Date: 2/19/2026

Vulnerability Publication Date: 2/4/2026

Reference Information

CVE: CVE-2026-1642

IAVA: 2026-A-0140