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Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS / 26.04 LTS : libsoup vulnerabilities (USN-8523-1)

critical Nessus Plugin ID 326252

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Synopsis

The remote Ubuntu host is missing one or more security updates.

Description

The remote Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS / 22.04 LTS / 24.04 LTS / 26.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-8523-1 advisory.

 Eric Su and Samuel Dainard discovered that libsoup incorrectly handled content with zero-length resources.
 An attacker could possibly use this issue to trigger a buffer over-read, resulting in information disclosure or a denial of service. This issue only affected Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, Ubuntu 24.04 LTS, Ubuntu 25.10, and Ubuntu 26.04 LTS. (CVE-2026-2369)

 Kona Arctic discovered that libsoup did not properly protect sensitive cookies when establishing HTTPS tunnels through an HTTP proxy. An attacker could possibly use this issue to intercept session cookies, resulting in session hijacking or user impersonation. (CVE-2026-5119)

Tenable has extracted the preceding description block directly from the Ubuntu 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

Update the affected packages.

See Also

https://ubuntu.com/security/notices/USN-8523-1

Plugin Details

Severity: Critical

ID: 326252

File Name: ubuntu_USN-8523-1.nasl

Version: 1.2

Type: Local

Agent: unix

Published: 7/10/2026

Updated: 7/10/2026

Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus Agent, Tenable Cloud Security, Tenable Self-Hosted Container Security, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.3

Percentile: 53.6

CVSS v2

Risk Factor: High

Base Score: 9.4

Temporal Score: 7.4

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

CVSS Score Source: CVE-2026-2369

CVSS v3

Risk Factor: Critical

Base Score: 9.1

Temporal Score: 8.2

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

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

Vulnerability Information

CPE: cpe:/o:canonical:ubuntu_linux:16.04:-:lts, cpe:/o:canonical:ubuntu_linux:18.04:-:lts, cpe:/o:canonical:ubuntu_linux:20.04:-:lts, cpe:/o:canonical:ubuntu_linux:22.04:-:lts, cpe:/o:canonical:ubuntu_linux:24.04:-:lts, cpe:/o:canonical:ubuntu_linux:26.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:gir1.2-soup-2.4, p-cpe:/a:canonical:ubuntu_linux:libsoup-2.4-1, p-cpe:/a:canonical:ubuntu_linux:libsoup-gnome-2.4-1, p-cpe:/a:canonical:ubuntu_linux:libsoup-gnome2.4-1, p-cpe:/a:canonical:ubuntu_linux:libsoup-gnome2.4-dev, p-cpe:/a:canonical:ubuntu_linux:libsoup2.4-1, p-cpe:/a:canonical:ubuntu_linux:libsoup2.4-common, p-cpe:/a:canonical:ubuntu_linux:libsoup2.4-dev, p-cpe:/a:canonical:ubuntu_linux:libsoup2.4-tests

Required KB Items: Host/cpu, Host/Ubuntu, Host/Ubuntu/release, Host/Debian/dpkg-l

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 7/9/2026

Vulnerability Publication Date: 2/19/2026

Reference Information

CVE: CVE-2026-2369, CVE-2026-5119

USN: 8523-1