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.
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History
Thu, 13 Aug 2026 15:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | 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. | |
| Title | rsync < 3.5.0 TOCTOU Race Condition Directory Escape via rrsync | |
| Weaknesses | CWE-59 CWE-88 |
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cvssV3_1
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Status: PUBLISHED
Assigner: VulnCheck
Published:
Updated: 2026-08-13T14:34:07.144Z
Reserved: 2026-06-10T20:14:32.826Z
Link: CVE-2026-53783
No data.
Status : Received
Published: 2026-08-13T15:19:41.913
Modified: 2026-08-13T15:19:41.913
Link: CVE-2026-53783
No data.
OpenCVE Enrichment
Updated: 2026-08-13T17:00:04Z