Search/CVE-2026-43617
● CVE — Medium

CVE-2026-43617

VendorsambaProductrsyncDiscoveredMay 20, 2026UpdatedJul 24, 2026

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.

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CVSS v3.1
4.8 MEDIUM
EPSS
0.28%
probability of exploitation in 30 days
CISA KEV
Not listed
no confirmed exploitation reported
News coverage
4
sources referencing this CVE
Related IOCs
0
seen in the same coverage
EPSS Trend
Aug 16, 2026 → Oct 26, 2026
● 0.00pp
0.28% → 0.28% over 3 tracked changes
CVSS v3.1 Detail
Attack VectorNETWORK
Attack ComplexityHIGH
Privileges RequiredNONE
User InteractionNONE
ScopeUNCHANGED
ConfidentialityLOW
IntegrityLOW
AvailabilityNONE
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
Connections
6 relationships
Timeline
disclosure → media coverage
May 20, 2026
Disclosure — published as a CVE record. · last revised by NVD Jul 24, 2026
May 20, 2026
ubuntu.com reports: USN-8283-1: rsync vulnerabilities
Jun 1, 2026
ubuntu.com reports: USN-8349-1: rsync vulnerabilities
Jun 8, 2026
ubuntu.com reports: USN-8349-2: rsync regression
Jun 16, 2026
ubuntu.com reports: USN-8349-3: rsync regression