HIGHVulnerability
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NVD HIGH: CVE-2026-53783 — rsync before 3.5.0 contains a time-of-check to time-of-use (TOCTOU) race conditi...

·Source: NIST NVD

Updated:

Executive Summary

rsync before 3.5.0 contains a time-of-check to time-of-use (TOCTOU) race condition vulnerability in the rrsync restricted shell wrapper that allows authenticated clients to escape enforced directory restrictions by substituting a symlink for a path component after validation but before transfer processing. Attackers can additionally leverage unrestricted flags such as --copy-unsafe-links, -D, and

Analysis

rsync before 3.5.0 contains a time-of-check to time-of-use (TOCTOU) race condition vulnerability in the rrsync restricted shell wrapper that allows authenticated clients to escape enforced directory restrictions by substituting a symlink for a path component after validation but before transfer processing. Attackers can additionally leverage unrestricted flags such as --copy-unsafe-links, -D, and --log-file through rrsync to read or write files outside the permitted directory subtree. CVSS Score: 8.1. Published: 2026-08-13T15:19:41.913.

Indicators of Compromise (1)

CVE (1)
CVE-2026-53783
NVDMITRE CVE
Source Attribution

Originally published by NIST NVD on Aug 13, 2026. Verified by: NIST.

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