Use After Free Affecting tmux/tmux package, versions [,3.7-rc)
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-UNMANAGED-TMUXTMUX-17429032
- published23 Jun 2026
- disclosed9 Jun 2026
- creditXlabAI
Introduced: 9 Jun 2026
CVE-2026-11623 (opens in a new tab)How to fix?
Upgrade tmux/tmux to version 3.7-rc or higher.
Overview
Affected versions of this package are vulnerable to Use After Free in the image_free function. An attacker can achieve unauthorized access to sensitive information or cause unexpected behavior by triggering memory reuse after it has been freed.