Amazon Linux 2023 : libsoup3, libsoup3-devel (ALAS2023-2026-1460)

high Nessus Plugin ID 301358

Synopsis

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

Description

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2026-1460 advisory.

A flaw was found in libsoup. An attacker who can control the input for the Content-Disposition header can inject CRLF (Carriage Return Line Feed) sequences into the header value. These sequences are then interpreted verbatim when the HTTP request or response is constructed, allowing arbitrary HTTP headers to be injected. This vulnerability can lead to HTTP header injection or HTTP response splitting without requiring authentication or user interaction. (CVE-2026-1536)

A flaw was found in the libsoup HTTP library that can cause proxy authentication credentials to be sent to unintended destinations. When handling HTTP redirects, libsoup removes the Authorization header but does not remove the Proxy-Authorization header if the request is redirected to a different host. As a result, sensitive proxy credentials may be leaked to third-party servers. Applications using libsoup for HTTP communication may unintentionally expose proxy authentication data. (CVE-2026-1539)

libsoup: heap buffer overflow in soup_content_sniffer_sniff (CVE-2026-2369)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Run 'dnf update libsoup3 --releasever 2023.10.20260302' or or 'dnf update --advisory ALAS2023-2026-1460 --releasever 2023.10.20260302' to update your system.

Plugin Details

Severity: High

ID: 301358

File Name: al2023_ALAS2023-2026-1460.nasl

Version: 1.1

Type: local

Agent: unix

Family: Amazon Linux Local Security Checks

Published: 3/6/2026

Updated: 3/6/2026

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

Risk Information

VPR

Risk Factor: High

Score: 7.4

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

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

CVSS Score Source: CVE-2026-1539

CVSS v3

Risk Factor: High

Base Score: 8.6

Temporal Score: 7.5

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

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

CVSS Score Source: CVE-2026-1536

Vulnerability Information

CPE: p-cpe:/a:amazon:linux:libsoup3-debugsource, p-cpe:/a:amazon:linux:libsoup3-doc, p-cpe:/a:amazon:linux:libsoup3, p-cpe:/a:amazon:linux:libsoup3-debuginfo, p-cpe:/a:amazon:linux:libsoup3-devel, cpe:/o:amazon:linux:2023

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

Exploit Ease: No known exploits are available

Patch Publication Date: 3/5/2026

Vulnerability Publication Date: 1/28/2026

Reference Information

CVE: CVE-2026-1536, CVE-2026-1539, CVE-2026-2369

IAVA: 2026-A-0139-S, 2026-A-0165

Detections

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