CVE-2026-11623

MEDIUM 4.5

tmux image.c image_free use after free

CVSS Score

4.5

EPSS Score

0.0%

EPSS Percentile

2th

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.

CWE	CWE-416 CWE-119
Vendor	n/a
Product	tmux
Published	Jun 9, 2026
Last Updated	Jun 9, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Scope

Confidentiality

Integrity

Availability

Affected Versions

n/a / tmux

3.6a

References

NVD ↗ CVE.org ↗ EPSS Data ↗

vuldb.com: https://vuldb.com/vuln/369303 vuldb.com: https://vuldb.com/vuln/369303/cti vuldb.com: https://vuldb.com/cve/CVE-2026-11623 vuldb.com: https://vuldb.com/submit/835623 gist.github.com: https://gist.github.com/XlabAITeam/f0d9952595f795129a3258ba73bbc3cb github.com: https://github.com/tmux/tmux/commit/fc6d94a9f8a593bd8b7031650802084385d4ee03 github.com: https://github.com/tmux/tmux/releases/tag/3.7-rc github.com: https://github.com/tmux/tmux/

Credits

🔍 XlabAI (VulDB User)