CVE-2026-11623
tmux image.c image_free use after free
Vexday Risk Score
28Low
SSVC decision (CISA)
Attend
PoC available → attend closely
Exploit maturity
Proof of concept
Public proof of concept exists, but not yet automated.
CVSS 2EPSS 0.1%KEV nãoPoC públicaNuclei —Metasploit —Patch referenciado
Lifecycle
09 Jun 2026Published on NVD
Recommendation: Plan a near-term fix — a public PoC already exists.
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:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
Affected products
n/a · tmuxpublic PoCs found — 1
cve_referencegist.github.com/XlabAITeam/f0d9952595f795129a3258ba73bbc3cbunverified⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
References
https://gist.github.com/XlabAITeam/f0d9952595f795129a3258ba73bbc3cbhttps://github.com/tmux/tmux/https://github.com/tmux/tmux/commit/fc6d94a9f8a593bd8b7031650802084385d4ee03https://github.com/tmux/tmux/releases/tag/3.7-rchttps://vuldb.com/cve/CVE-2026-11623https://vuldb.com/submit/835623https://vuldb.com/vuln/369303https://vuldb.com/vuln/369303/cti