Amazon Linux 2 : ca-certificates (ALAS-2026-4045)

medium Nessus Plugin ID 373426

Synopsis

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

Description

The version of ca-certificates installed on the remote host is prior to 2025.2.76-1. It is, therefore, affected by a vulnerability as referenced in the ALAS2-2026-4045 advisory.

The system certificate authority (CA) store in Amazon Linux, distributed via the ca-certificates RPM package, included multiple root CA certificates belonging to authorities that signed eMudhra intermediate CA certificates with weak private keys.The root CA certificates that signed the weak intermediates were removed under CVE-2026-113470, which is the primary fix for this exposure:
https://explore.alas.aws.amazon.com/CVE-2026-113470.html. Systems with that update installed no longer trust the weak intermediate CA certificates.CVE-2026-114406 additionally removes the remaining CA certificates that were associated with the same CA operators, and removing them ensures no residual trust in those operators remains in the system CA store (CVE-2026-114406)

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 ca-certificates' or or 'yum update --advisory ALAS2-2026-4045' to update your system.

Plugin Details

Severity: Medium

ID: 373426

File Name: al2_ALAS-2026-4045.nasl

Version: 1.1

Type: Local

Agent: unix

Family: Amazon Linux Local Security Checks

Published: 10/28/2026

Updated: 10/28/2026

Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Continuous Assessment, Tenable Cloud Security, Tenable Self-Hosted Container Security, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.3

Percentile: 53.53

CVSS v2

Risk Factor: High

Base Score: 7.1

Temporal Score: 5.3

Vector: CVSS2#AV:N/AC:H/Au:N/C:C/I:C/A:N

CVSS Score Source: CVE-2026-114406

CVSS v3

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5.9

Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:amazon:linux:2, p-cpe:/a:amazon:linux:ca-certificates

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

Exploit Ease: No known exploits are available

Patch Publication Date: 10/28/2026

Vulnerability Publication Date: 10/21/2026

Reference Information

CVE: CVE-2026-114406

Detections

Analytics