CVE intelligence

CVE-2026-11623

Vulnerability intelligence

Published Jun 9, 2026Sources checked Nov 12, 2026

4.5MEDIUMCVSS out of 10

What this means

Review the available evidence

CVE-2026-11623 and is rated Medium severity with a CVSS score of 4.5. It is not in the current CISA KEV record we collected. That does not prove exploitation has not occurred.

What to do next

Remediation and response

Microsoft Security Response Center guidance

Vendor revision: Jul 6, 2026

CBL-Mariner Releases

Vendor-listed releases

3.4-2

CISA KEVNot listedBased on the latest collected catalog

EPSS0.1%Estimated 30-day exploitation probability

Ransomware useNot markedCISA KEV ransomware field

Threat actors0Source-linked actor relationships

Overview

What is CVE-2026-11623?

A security vulnerability has been detected in tmux up to 3.6a. Affected is the function image_free of the file image.c.

Such manipulation leads to use after free. Local access is required to approach this attack.

This attack is characterized by high complexity. The exploitability is told to be difficult.

The exploit has been disclosed publicly and may be used. Upgrading to version 3.7-rc is able to address this issue.

The name of the patch is fc6d94a9f8a593bd8b7031650802084385d4ee03. The affected component should be upgraded.

Source: NVD