CVE-2026-53791

ADVISORY - nist

Summary

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.

EPSS Score⁠: 0.00501 (0.409)

Common Weakness Enumeration (CWE)

ADVISORY - nist

CWE-290⁠

Authentication Bypass by Spoofing

Impacted images

Advisories

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