Authentication Bypass Affecting rsync package, versions <0:3.2.7-1.el9_8


Severity

Recommended
high

Based on Oracle Linux security rating.

Threat Intelligence

EPSS
0.5% (41st percentile)

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 applications
  • Snyk IDSNYK-ORACLE9-RSYNC-19869470
  • published16 Sept 2026
  • disclosed13 Aug 2026

Introduced: 13 Aug 2026

CVE-2026-53791  (opens in a new tab)
CWE-290  (opens in a new tab)

How to fix?

Upgrade Oracle:9 rsync to version 0:3.2.7-1.el9_8 or higher.
This issue was patched in ELSA-2026-67462-0.

NVD Description

Note: Versions mentioned in the description apply only to the upstream rsync package and not the rsync package as distributed by Oracle. See How to fix? for Oracle:9 relevant fixed versions and status.

rsync daemon before 3.5.0 contains an IP address spoofing vulnerability that allows unauthenticated remote attackers to bypass IP-based access controls by sending a crafted PROXY protocol header with a forged source address. Attackers who can connect directly to the rsync daemon can inject a spoofed source IP in the PROXY protocol header to circumvent hosts allow/deny rules, gaining unauthorized access that would otherwise be blocked based on their real source address.

CVSS Base Scores

version 3.1