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Alibaba Cloud Linux 3 : 0226: python3 (ALINUX3-SA-2026:0226)

high Nessus Plugin ID 329122

Synopsis

The remote Alibaba Cloud Linux host is missing one or more security updates.

Description

The remote Alibaba Cloud Linux 3 host has packages installed that are affected by a vulnerability as referenced in the ALINUX3-SA-2026:0226 advisory.

 Package updates are available for Alibaba Cloud Linux 3 that fix the following vulnerabilities:

 CVE-2026-15308:
 The incremental HTML parser (html.parser.HTMLParser) allows for CPU denial-of-service through repeated unterminated markup declarations when processing uncontrolled data.

Tenable has extracted the preceding description block directly from the Alibaba Cloud Linux 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

Update the affected packages.

See Also

http://mirrors.aliyun.com/alinux/3/cve/alinux3-sa-20260226.xml

Plugin Details

Severity: High

ID: 329122

File Name: alinux3_sa_2026-0226.nasl

Version: 1.1

Type: Local

Published: 7/23/2026

Updated: 7/23/2026

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.78

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

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

CVSS Score Source: CVE-2026-15308

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

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:U/RL:O/RC:C

CVSS v4

Risk Factor: High

Base Score: 8.7

Threat Score: 6.6

Threat Vector: CVSS:4.0/E:U

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

Vulnerability Information

CPE: cpe:/o:alibabacloud:alibaba_cloud_linux_3, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:platform-python-debug, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:platform-python-devel, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:platform-python, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:python3-devel, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:python3-idle, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:python3-libs, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:python3-test, p-cpe:/a:alibabacloud:alibaba_cloud_linux_3:python3-tkinter

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

Exploit Ease: No known exploits are available

Patch Publication Date: 7/22/2026

Vulnerability Publication Date: 7/9/2026

Reference Information

CVE: CVE-2026-15308