Detections
Analytics

Amazon Linux 2 : php (ALAS-2026-4015)

high Nessus Plugin ID 371788

Synopsis

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

Description

The version of php installed on the remote host is prior to 5.4.16-46. It is, therefore, affected by a vulnerability as referenced in the ALAS2-2026-4015 advisory.

 cleanup_xml_node() in the SOAP XML parser recurses once per XML nesting level with no depth limit. An unauthenticated attacker can post a SOAP request containing tens of thousands of nested elements to any SoapServer endpoint, exhaust the stack and crash the process. The same unbounded recursion exists in the SOAP value decoder and in the WSDL node search helper. (CVE-2026-91765)

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 php' or or 'yum update --advisory ALAS2-2026-4015' to update your system.

See Also

https://alas.aws.amazon.com//AL2/ALAS2-2026-4015.html

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

https://explore.alas.aws.amazon.com/CVE-2026-91765.html

Plugin Details

Severity: High

ID: 371788

File Name: al2_ALAS-2026-4015.nasl

Version: 1.1

Type: Local

Agent: unix

Published: 10/24/2026

Updated: 10/24/2026

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: Low

Score: 3

Percentile: 23.71

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.1

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

CVSS Score Source: CVE-2026-91765

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.7

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

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

Vulnerability Information

CPE: cpe:/o:amazon:linux:2, p-cpe:/a:amazon:linux:php-bcmath, p-cpe:/a:amazon:linux:php-cli, p-cpe:/a:amazon:linux:php-common, p-cpe:/a:amazon:linux:php-dba, p-cpe:/a:amazon:linux:php-debuginfo, p-cpe:/a:amazon:linux:php-devel, p-cpe:/a:amazon:linux:php-embedded, p-cpe:/a:amazon:linux:php-enchant, p-cpe:/a:amazon:linux:php-fpm, p-cpe:/a:amazon:linux:php-gd, p-cpe:/a:amazon:linux:php-intl, p-cpe:/a:amazon:linux:php-ldap, p-cpe:/a:amazon:linux:php-mbstring, p-cpe:/a:amazon:linux:php-mysqlnd, p-cpe:/a:amazon:linux:php-odbc, p-cpe:/a:amazon:linux:php-pdo, p-cpe:/a:amazon:linux:php-pgsql, p-cpe:/a:amazon:linux:php-process, p-cpe:/a:amazon:linux:php-pspell, p-cpe:/a:amazon:linux:php-recode, p-cpe:/a:amazon:linux:php-snmp, p-cpe:/a:amazon:linux:php-soap, p-cpe:/a:amazon:linux:php-xml, p-cpe:/a:amazon:linux:php-xmlrpc, p-cpe:/a:amazon:linux:php

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: 9/22/2026

Reference Information

CVE: CVE-2026-91765

IAVA: 2026-A-1074-S