Time-of-check Time-of-use (TOCTOU) Race Condition Affecting rsync package, versions [0,]
Threat Intelligence
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 applicationsSnyk Learn
Learn about Time-of-check Time-of-use (TOCTOU) Race Condition vulnerabilities in an interactive lesson.
Start learning- Snyk IDSNYK-CONAN-RSYNC-16771097
- published20 May 2026
- disclosed20 May 2026
- credittridge
Introduced: 20 May 2026
NewCVE-2026-43619 (opens in a new tab)How to fix?
A fix was pushed into the master branch but not yet published.
Overview
Affected versions of this package are vulnerable to Time-of-check Time-of-use (TOCTOU) Race Condition via the timing window between path resolution and syscall execution in operations such as chmod, lchown, utimes, rename, unlink, mkdir, symlink, mknod, link, rmdir, and lstat. An attacker can modify files outside the intended module boundary by swapping symlinks to redirect operations and apply sender-supplied permissions, ownership, timestamps, or filenames to arbitrary files. This is only exploitable if the rsync daemon is configured with 'use chroot = no'.