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Amazon Linux 2 : tomcat, --advisory ALAS2-2026-3204 (ALAS-2026-3204)

medium Nessus Plugin ID 303098

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Synopsis

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

Description

The version of tomcat installed on the remote host is prior to 7.0.76-10. It is, therefore, affected by a vulnerability as referenced in the ALAS2-2026-3204 advisory.

 A flaw was found in Tomcat. An improper input validation vulnerability allows an attacker to bypass security constraints. Specifically, if a security constraint is configured to permit HEAD requests to a URI but deny GET requests, a malformed or specification invalid HEAD request using the HTTP/0.9 protocol can bypass the intended denial rule, enabling an attacker to access resources that should be protected.
 (CVE-2026-24733)

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 tomcat' or or 'yum update --advisory ALAS2-2026-3204' to update your system.

See Also

https://alas.aws.amazon.com//AL2/ALAS2-2026-3204.html

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

https://explore.alas.aws.amazon.com/CVE-2026-24733.html

Plugin Details

Severity: Medium

ID: 303098

File Name: al2_ALAS-2026-3204.nasl

Version: 1.1

Type: local

Agent: unix

Published: 3/19/2026

Updated: 3/19/2026

Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 2.9

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-2026-24733

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: 6.9

Threat Score: 2.7

Threat Vector: CVSS:4.0/E:U

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

Vulnerability Information

CPE: p-cpe:/a:amazon:linux:tomcat-javadoc, p-cpe:/a:amazon:linux:tomcat-lib, p-cpe:/a:amazon:linux:tomcat-webapps, p-cpe:/a:amazon:linux:tomcat-servlet-3.0-api, p-cpe:/a:amazon:linux:tomcat-jsp-2.2-api, cpe:/o:amazon:linux:2, p-cpe:/a:amazon:linux:tomcat-jsvc, p-cpe:/a:amazon:linux:tomcat-admin-webapps, p-cpe:/a:amazon:linux:tomcat-docs-webapp, p-cpe:/a:amazon:linux:tomcat-el-2.2-api, p-cpe:/a:amazon:linux:tomcat

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

Exploit Ease: No known exploits are available

Patch Publication Date: 3/19/2026

Vulnerability Publication Date: 12/8/2025

Reference Information

CVE: CVE-2026-24733

IAVA: 2026-A-0175