RsyncProject rsync up to 3.4.4 path traversal

Summaryinfo

A vulnerability was found in RsyncProject rsync up to 3.4.4. It has been classified as problematic. This issue affects some unknown processing. This manipulation causes path traversal. The identification of this vulnerability is CVE-2026-53789. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability has been found in RsyncProject rsync up to 3.4.4 and classified as problematic. Affected by this vulnerability is an unknown code block. The manipulation with an unknown input leads to a path traversal vulnerability. The CWE definition for the vulnerability is CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. As an impact it is known to affect integrity, and availability. The summary by CVE is:

rsync before 3.5.0 contains an improper path handling vulnerability that allows a malicious sender to expand the scope of --delete operations beyond the intended destination subtree by sending a crafted file list that causes rsync to reclassify implied parent directory entries or treat synthetic paths as the transfer root. Attackers can exploit multiple variants including implied parent reclassification, synthetic root path construction, legacy protocol behavior below version 30, and non-directory root handling to cause the receiver to delete files outside the authorized destination directory.

The advisory is shared at github.com. This vulnerability is known as CVE-2026-53789 since 06/10/2026. The exploitation appears to be easy. The attack can be launched remotely. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1006 for this issue.

Upgrading to version 3.5.0 eliminates this vulnerability.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

• File Transfer Software

Vendor

• RsyncProject

Name

• rsync

Version

• 3.4.0
• 3.4.1
• 3.4.2
• 3.4.3
• 3.4.4

Website

• Product: https://github.com/RsyncProject/rsync/

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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