Incorrect Authorization Affecting rsync package, versions <3.5.0


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.4% (32nd percentile)

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  • Snyk IDSNYK-ECHOLATEST-RSYNC-18751765
  • published13 Aug 2026
  • disclosed13 Aug 2026

Introduced: 13 Aug 2026

CVE-2026-53786  (opens in a new tab)
CWE-863  (opens in a new tab)

How to fix?

Upgrade Echo:latest rsync to version 3.5.0 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream rsync package and not the rsync package as distributed by Echo. See How to fix? for Echo:latest relevant fixed versions and status.

rsync before 3.5.0 contains a filter rule bypass vulnerability that allows authenticated clients to override module-level filter restrictions by supplying malicious --filter merge file directives. Attackers can inject client-side merge file directives during filter evaluation to introduce rules that supersede daemon module-level restrictions, gaining access to files the module filter was intended to exclude.

CVSS Base Scores

version 3.1