Medium 4.5Published Jun 8, 2026

CVE-2026-11623tmux image.c image_free use after free

Updated under an hour ago (Oct 27, 2026, 9:10 PM ET)

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It affects n/a tmux. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for n/a tmux

Exploited in the last 30 days

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.

CVSS: 4.5 MEDIUM (v3.1, CNA)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
Weakness (CWE): CWE-416, CWE-119
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: VulDB
NVD analysis: Deferred
Record last updated: Jun 23, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

n/a tmux tmux:tmux	3.6a; 3.7-rc not affected	CNA record

References

References

https://vuldb.com/vuln/369303	vdb-entry, technical-description
https://vuldb.com/vuln/369303/cti	signature, permissions-required
https://vuldb.com/cve/CVE-2026-11623	third-party-advisory
https://vuldb.com/submit/835623	third-party-advisory
https://gist.github.com/XlabAITeam/f0d9952595f795129a3258ba73bbc3cb	exploit
https://github.com/tmux/tmux/commit/fc6d94a9f8a593bd8b7031650802084385d4ee03	patch
https://github.com/tmux/tmux/releases/tag/3.7-rc	patch
https://github.com/tmux/tmux/	product

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.