Time-of-check Time-of-use (TOCTOU) Race Condition Affecting pbatard/rufus package, versions [,4.12-beta)
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.
Do your applications use this vulnerable package?
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applications- Snyk IDSNYK-UNMANAGED-PBATARDRUFUS-15067755
- published23 Jan 2026
- disclosed22 Jan 2026
- creditUnknown
Introduced: 22 Jan 2026
CVE-2026-23988 (opens in a new tab)How to fix?
Upgrade pbatard/rufus to version 4.12-beta or higher.
Overview
Affected versions of this package are vulnerable to Time-of-check Time-of-use (TOCTOU) Race Condition via the process of creating, validating, and executing of the PowerShell script in DownloadISOThread() function. An attacker can execute arbitrary code with elevated privileges by replacing the legitimate script with a malicious one between the file write and execution steps.