Linux Distros Unpatched Vulnerability : CVE-2026-88859

critical Nessus Plugin ID 344594

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 Evolution. A remote attacker can exploit this vulnerability by sending a specially crafted HTML email containing a spoofed vCard control. When a victim clicks on this control, Evolution's trusted JavaScript handler incorrectly assigns an attacker-controlled JavaScript URL to an iframe's source. This action leads to arbitrary JavaScript execution within the mail-viewing context, effectively bypassing the security measures designed to prevent script execution in email content. (CVE-2026-88859)

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: 344594

File Name: unpatched_CVE_2026_88859.nasl

Version: 1.1

Type: Local

Agent: unix

Family: Misc.

Published: 9/10/2026

Updated: 9/10/2026

Supported Sensors: Nessus Agent, Nessus

Risk Information

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 4.3

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

CVSS Score Source: CVE-2026-88859

CVSS v3

Risk Factor: Critical

Base Score: 9.1

Temporal Score: 8.3

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

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

Vulnerability Information

CPE: cpe:/o:centos:centos:7, cpe:/o:centos:centos:8, cpe:/o:redhat:enterprise_linux:7, cpe:/o:redhat:enterprise_linux:8, cpe:/o:redhat:enterprise_linux:9, p-cpe:/a:centos:centos:evolution-bogofilter, p-cpe:/a:centos:centos:evolution-devel-docs, p-cpe:/a:centos:centos:evolution-devel, p-cpe:/a:centos:centos:evolution-help, p-cpe:/a:centos:centos:evolution-langpacks, p-cpe:/a:centos:centos:evolution-pst, p-cpe:/a:centos:centos:evolution-spamassassin, p-cpe:/a:centos:centos:evolution-tests, p-cpe:/a:centos:centos:evolution, p-cpe:/a:redhat:enterprise_linux:evolution-bogofilter, p-cpe:/a:redhat:enterprise_linux:evolution-devel-docs, p-cpe:/a:redhat:enterprise_linux:evolution-devel, p-cpe:/a:redhat:enterprise_linux:evolution-help, p-cpe:/a:redhat:enterprise_linux:evolution-langpacks, p-cpe:/a:redhat:enterprise_linux:evolution-pst, p-cpe:/a:redhat:enterprise_linux:evolution-spamassassin, p-cpe:/a:redhat:enterprise_linux:evolution-tests, p-cpe:/a:redhat:enterprise_linux:evolution

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: 9/10/2026

Reference Information

CVE: CVE-2026-88859

Detections

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