What is CVE-2026-43617?

CVE-2026-43617 is a medium-severity vulnerability in Rsyncproject Rsync, classified under CWE-289. CVSS score: 4.8/10. Published 2026-05-20.

How severe is CVE-2026-43617?

Medium severity. CVSS v3 base score is 4.8 out of 10.

Vulnerability in Rsyncproject Rsync

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…

EPSS: 0.000 (2.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.8 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N.

Affected products

Rsyncproject Rsync — versions 0
Samba Rsync

Weakness classification (CWE)

CWE-289

References

disclosure@vulncheck.com (vendor-advisory, Vendor Advisory)
disclosure@vulncheck.com (release-notes, Release Notes)
disclosure@vulncheck.com (Third Party Advisory, third-party-advisory)

Frequently asked questions

What is CVE-2026-43617?: CVE-2026-43617 is a medium-severity vulnerability in Rsyncproject Rsync, classified under CWE-289. CVSS score: 4.8/10. Published 2026-05-20.
How severe is CVE-2026-43617?: Medium severity. CVSS v3 base score is 4.8 out of 10.