Linux Distros Unpatched Vulnerability : CVE-2026-1761

critical Nessus Plugin ID 297573

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Synopsis

The Linux/Unix host has one or more packages installed with a vulnerability that the vendor indicates will not be patched.

Description

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

- A flaw was found in libsoup. This stack-based buffer overflow vulnerability occurs during the parsing of multipart HTTP responses due to an incorrect length calculation. A remote attacker can exploit this by sending a specially crafted multipart HTTP response, which can lead to memory corruption. This issue may result in application crashes or arbitrary code execution in applications that process untrusted server responses, and it does not require authentication or user interaction. (CVE-2026-1761)

Note that Nessus relies on the presence of the package as reported by the vendor.

Solution

There is no known solution at this time.

Plugin Details

Severity: Critical

ID: 297573

File Name: unpatched_CVE_2026_1761.nasl

Version: 1.4

Type: local

Agent: unix

Family: Misc.

Published: 2/2/2026

Updated: 2/4/2026

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

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: High

Base Score: 9

Temporal Score: 7.7

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

CVSS Score Source: CVE-2026-1761

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 9

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

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

Vulnerability Information

CPE: cpe:/o:debian:debian_linux:11.0, cpe:/o:canonical:ubuntu_linux:16.04:-:lts, p-cpe:/a:centos:centos:libsoup, p-cpe:/a:centos:centos:libsoup-devel, p-cpe:/a:redhat:enterprise_linux:libsoup, p-cpe:/a:redhat:enterprise_linux:libsoup-devel, cpe:/o:canonical:ubuntu_linux:24.04:-:lts, cpe:/o:redhat:enterprise_linux:10, cpe:/o:centos:centos:7, cpe:/o:redhat:enterprise_linux:7, cpe:/o:redhat:enterprise_linux:8, cpe:/o:canonical:ubuntu_linux:18.04:-:lts, cpe:/o:canonical:ubuntu_linux:20.04:-:lts, p-cpe:/a:debian:debian_linux:libsoup2.4, cpe:/o:centos:centos:8, cpe:/o:canonical:ubuntu_linux:22.04:-:lts, cpe:/o:redhat:enterprise_linux:9, cpe:/o:debian:debian_linux:12.0, cpe:/o:debian:debian_linux:13.0, p-cpe:/a:debian:debian_linux:libsoup3, p-cpe:/a:canonical:ubuntu_linux:libsoup3, p-cpe:/a:canonical:ubuntu_linux:libsoup2.4, p-cpe:/a:redhat:enterprise_linux:libsoup3, p-cpe:/a:redhat:enterprise_linux:libsoup3-devel, p-cpe:/a:redhat:enterprise_linux:libsoup3-doc, cpe:/o:debian:debian_linux:14.0, p-cpe:/a:centos:centos:libsoup3, p-cpe:/a:centos:centos:libsoup3-devel, p-cpe:/a:centos:centos:libsoup3-doc, cpe:/o:canonical:ubuntu_linux:25.10

Required KB Items: Host/local_checks_enabled, Host/cpu, global_settings/vendor_unpatched, Host/OS/identifier

Exploit Ease: No known exploits are available

Vulnerability Publication Date: 2/2/2026

Reference Information

CVE: CVE-2026-1761

Detections

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