Detections
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Amazon Linux 2023 : brotli, brotli-devel, libbrotli (ALAS2023-2026-3334)

critical Nessus Plugin ID 371897

Synopsis

The remote Amazon Linux 2023 host is missing a security update.

Description

It is, therefore, affected by a vulnerability as referenced in the ALAS2023-2026-3334 advisory.

 A vulnerability in the Node.js Brotli decoder can result in an out-of-bounds memory write when processing crafted Brotli input. Successful exploitation may lead to memory corruption and remote code execution.
 (CVE-2026-111497)

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 'dnf update brotli --releasever 2023.12.20261026' or or 'dnf update --advisory ALAS2023-2026-3334 --releasever 2023.12.20261026' to update your system.

See Also

https://alas.aws.amazon.com//AL2023/ALAS2023-2026-3334.html

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

https://explore.alas.aws.amazon.com/CVE-2026-111497.html

Plugin Details

Severity: Critical

ID: 371897

File Name: al2023_ALAS2023-2026-3334.nasl

Version: 1.1

Type: Local

Agent: unix

Published: 10/25/2026

Updated: 10/25/2026

Supported Sensors: Nessus Agent, Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: High

Score: 7.9

Percentile: 99.33

CVSS v2

Risk Factor: High

Base Score: 7.5

Temporal Score: 5.9

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

CVSS Score Source: CVE-2026-111497

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.8

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

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

CVSS v4

Risk Factor: Critical

Base Score: 9.2

Threat Score: 8.2

Threat Vector: CVSS:4.0/E:P

Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Vulnerability Information

CPE: cpe:/o:amazon:linux:2023, p-cpe:/a:amazon:linux:brotli-debuginfo, p-cpe:/a:amazon:linux:brotli-debugsource, p-cpe:/a:amazon:linux:brotli-devel, p-cpe:/a:amazon:linux:brotli, p-cpe:/a:amazon:linux:libbrotli-debuginfo, p-cpe:/a:amazon:linux:libbrotli, p-cpe:/a:amazon:linux:python3-brotli-debuginfo, p-cpe:/a:amazon:linux:python3-brotli

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 10/24/2026

Vulnerability Publication Date: 10/21/2026

Reference Information

CVE: CVE-2026-111497

IAVA: 2026-A-1200