Vulnerability Details CVE-2026-43617
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.0
EPSS Ranking 2.4%
CVSS Severity
CVSS v3 Score 4.8
References
Products affected by CVE-2026-43617
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cpe:2.3:a:samba:rsync:1.6.4
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cpe:2.3:a:samba:rsync:1.6.5
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cpe:2.3:a:samba:rsync:1.6.6
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cpe:2.3:a:samba:rsync:1.6.7
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cpe:2.3:a:samba:rsync:1.6.8
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cpe:2.3:a:samba:rsync:1.6.9
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cpe:2.3:a:samba:rsync:1.7.0
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cpe:2.3:a:samba:rsync:1.7.1
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cpe:2.3:a:samba:rsync:1.7.2
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cpe:2.3:a:samba:rsync:1.7.3
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cpe:2.3:a:samba:rsync:1.7.4
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cpe:2.3:a:samba:rsync:2.0.0
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cpe:2.3:a:samba:rsync:2.0.1
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cpe:2.3:a:samba:rsync:2.0.10
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cpe:2.3:a:samba:rsync:2.0.11
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cpe:2.3:a:samba:rsync:2.0.12
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cpe:2.3:a:samba:rsync:2.0.13
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cpe:2.3:a:samba:rsync:2.0.14
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cpe:2.3:a:samba:rsync:2.0.15
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cpe:2.3:a:samba:rsync:2.0.16
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cpe:2.3:a:samba:rsync:2.0.17
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cpe:2.3:a:samba:rsync:2.0.18
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cpe:2.3:a:samba:rsync:2.0.19
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cpe:2.3:a:samba:rsync:2.0.2
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cpe:2.3:a:samba:rsync:2.0.3
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cpe:2.3:a:samba:rsync:2.0.4
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cpe:2.3:a:samba:rsync:2.0.5
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cpe:2.3:a:samba:rsync:2.0.6
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cpe:2.3:a:samba:rsync:2.0.7
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cpe:2.3:a:samba:rsync:2.0.8
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cpe:2.3:a:samba:rsync:2.0.9
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cpe:2.3:a:samba:rsync:2.1.0
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cpe:2.3:a:samba:rsync:2.1.1
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cpe:2.3:a:samba:rsync:2.2.0
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cpe:2.3:a:samba:rsync:2.2.1
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cpe:2.3:a:samba:rsync:2.3.0
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cpe:2.3:a:samba:rsync:2.3.1
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cpe:2.3:a:samba:rsync:2.3.2
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cpe:2.3:a:samba:rsync:2.3.3
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cpe:2.3:a:samba:rsync:2.4.0
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cpe:2.3:a:samba:rsync:2.4.1
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cpe:2.3:a:samba:rsync:2.4.2
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cpe:2.3:a:samba:rsync:2.4.3
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cpe:2.3:a:samba:rsync:2.4.4
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cpe:2.3:a:samba:rsync:2.4.5
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cpe:2.3:a:samba:rsync:2.4.6
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cpe:2.3:a:samba:rsync:2.4.7
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cpe:2.3:a:samba:rsync:2.4.8
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cpe:2.3:a:samba:rsync:2.5.0
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cpe:2.3:a:samba:rsync:2.5.1
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cpe:2.3:a:samba:rsync:2.5.2
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cpe:2.3:a:samba:rsync:2.5.3
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cpe:2.3:a:samba:rsync:2.5.4
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cpe:2.3:a:samba:rsync:2.5.5
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cpe:2.3:a:samba:rsync:2.5.6
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cpe:2.3:a:samba:rsync:2.5.7
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cpe:2.3:a:samba:rsync:2.6.0
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cpe:2.3:a:samba:rsync:2.6.1
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cpe:2.3:a:samba:rsync:2.6.2
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cpe:2.3:a:samba:rsync:2.6.3
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cpe:2.3:a:samba:rsync:2.6.4
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cpe:2.3:a:samba:rsync:2.6.5
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cpe:2.3:a:samba:rsync:2.6.6
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cpe:2.3:a:samba:rsync:2.6.7
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cpe:2.3:a:samba:rsync:2.6.8
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cpe:2.3:a:samba:rsync:2.6.9
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cpe:2.3:a:samba:rsync:3.0.0
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cpe:2.3:a:samba:rsync:3.0.1
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cpe:2.3:a:samba:rsync:3.0.2
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cpe:2.3:a:samba:rsync:3.0.3
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cpe:2.3:a:samba:rsync:3.0.4
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cpe:2.3:a:samba:rsync:3.0.5
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cpe:2.3:a:samba:rsync:3.0.6
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cpe:2.3:a:samba:rsync:3.0.7
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cpe:2.3:a:samba:rsync:3.0.8
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cpe:2.3:a:samba:rsync:3.0.9
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cpe:2.3:a:samba:rsync:3.1.0
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cpe:2.3:a:samba:rsync:3.1.1
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cpe:2.3:a:samba:rsync:3.1.2
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cpe:2.3:a:samba:rsync:3.1.3
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cpe:2.3:a:samba:rsync:3.2.0
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cpe:2.3:a:samba:rsync:3.2.1
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cpe:2.3:a:samba:rsync:3.2.2
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cpe:2.3:a:samba:rsync:3.2.3
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cpe:2.3:a:samba:rsync:3.2.4
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cpe:2.3:a:samba:rsync:3.2.7
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cpe:2.3:a:samba:rsync:3.3.0