CVE-2026-43617

MediumCVSS 4.8/10Last modified Jul 24, 2026

Description

Rsync version 3.4.2 and prior contain an authorization bypass vulnerability in the rsync daemon's hostname-based access control list enforcement when configured with chroot. Attackers can bypass hostname-based deny rules by controlling the PTR record for their source IP address, allowing connections from hostnames that administrators intended to deny when reverse DNS resolution fails and defaults to UNKNOWN.

Metrics

CVSS 3.1 4.8/10CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N

Weakness enumeration

CWE-289

Affected software

No affected versions have been published.

Timeline

Published: May 20, 2026
Last modified: Jul 24, 2026
NVD status: Analyzed

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